• https://repository.upb.edu.co/handle/20.500.11912/6098
• https://repository.upb.edu.co/handle/20.500.11912/6892
• https://repository.upb.edu.co/handle/20.500.11912/2046
• https://repository.upb.edu.co/handle/20.500.11912/5014
• https://repository.upb.edu.co/handle/20.500.11912/3099
• https://repository.upb.edu.co/handle/20.500.11912/7434
• https://repository.upb.edu.co/handle/20.500.11912/10651
• https://repository.upb.edu.co/handle/20.500.11912/9546
• https://repository.upb.edu.co/handle/20.500.11912/8745
• https://repository.upb.edu.co/handle/20.500.11912/6386
• https://repository.upb.edu.co/handle/20.500.11912/5554
• https://repository.upb.edu.co/handle/20.500.11912/11609
• https://repository.upb.edu.co/handle/20.500.11912/6928
• https://repository.upb.edu.co/handle/20.500.11912/1614
• https://repository.upb.edu.co/handle/20.500.11912/10877
• https://repository.upb.edu.co/handle/20.500.11912/9066
• https://repository.upb.edu.co/handle/20.500.11912/3159
• https://repository.upb.edu.co/handle/20.500.11912/8871
• https://repository.upb.edu.co/handle/20.500.11912/7320
• https://repository.upb.edu.co/handle/20.500.11912/2217
• https://repository.upb.edu.co/handle/20.500.11912/5035
• https://repository.upb.edu.co/handle/20.500.11912/6161
• https://repository.upb.edu.co/handle/20.500.11912/2791
• https://repository.upb.edu.co/handle/20.500.11912/11528
• https://repository.upb.edu.co/handle/20.500.11912/8081
• https://repository.upb.edu.co/handle/20.500.11912/8533
• https://repository.upb.edu.co/handle/20.500.11912/10526
• https://repository.upb.edu.co/handle/20.500.11912/6220
• https://repository.upb.edu.co/handle/20.500.11912/11685
• https://repository.upb.edu.co/handle/20.500.11912/11482
• https://repository.upb.edu.co/handle/20.500.11912/3616
• https://repository.upb.edu.co/handle/20.500.11912/9948
• https://repository.upb.edu.co/handle/20.500.11912/7415
• https://repository.upb.edu.co/handle/20.500.11912/5052
• https://repository.upb.edu.co/handle/20.500.11912/11129
• https://repository.upb.edu.co/handle/20.500.11912/4337
• https://repository.upb.edu.co/handle/20.500.11912/5869
• https://repository.upb.edu.co/handle/20.500.11912/2198
• https://repository.upb.edu.co/handle/20.500.11912/8008
• https://repository.upb.edu.co/handle/20.500.11912/8098
• https://repository.upb.edu.co/handle/20.500.11912/6717
• https://repository.upb.edu.co/handle/20.500.11912/11074
• https://repository.upb.edu.co/handle/20.500.11912/11252
• https://repository.upb.edu.co/handle/20.500.11912/426
• https://repository.upb.edu.co/handle/20.500.11912/10826
• https://repository.upb.edu.co/handle/20.500.11912/398
• https://repository.upb.edu.co/handle/20.500.11912/9635
• https://repository.upb.edu.co/handle/20.500.11912/7690
• https://repository.upb.edu.co/handle/20.500.11912/8064
• https://repository.upb.edu.co/handle/20.500.11912/821
• https://repository.upb.edu.co/handle/20.500.11912/9080
• https://repository.upb.edu.co/handle/20.500.11912/2771
• https://repository.upb.edu.co/handle/20.500.11912/6682
• https://repository.upb.edu.co/handle/20.500.11912/11757
• https://repository.upb.edu.co/handle/20.500.11912/3751
• https://repository.upb.edu.co/handle/20.500.11912/2567
• https://repository.upb.edu.co/handle/20.500.11912/9796
• https://repository.upb.edu.co/handle/20.500.11912/5619
• https://repository.upb.edu.co/handle/20.500.11912/6216
• https://repository.upb.edu.co/handle/20.500.11912/2620
• https://repository.upb.edu.co/handle/20.500.11912/7683
• https://repository.upb.edu.co/handle/20.500.11912/12204
• https://repository.upb.edu.co/handle/20.500.11912/7110
• https://repository.upb.edu.co/handle/20.500.11912/4026
• https://repository.upb.edu.co/handle/20.500.11912/8892
• https://repository.upb.edu.co/handle/20.500.11912/4551
• https://repository.upb.edu.co/handle/20.500.11912/5840
• https://repository.upb.edu.co/handle/20.500.11912/2780
• https://repository.upb.edu.co/handle/20.500.11912/164
• https://repository.upb.edu.co/handle/20.500.11912/1991
• https://repository.upb.edu.co/handle/20.500.11912/1524
• https://repository.upb.edu.co/handle/20.500.11912/4954
• https://repository.upb.edu.co/handle/20.500.11912/3856
• https://repository.upb.edu.co/handle/20.500.11912/1331
• https://repository.upb.edu.co/handle/20.500.11912/5640
• https://repository.upb.edu.co/handle/20.500.11912/7030
• https://repository.upb.edu.co/handle/20.500.11912/12127
• https://repository.upb.edu.co/handle/20.500.11912/11992
• https://repository.upb.edu.co/handle/20.500.11912/11527
• https://repository.upb.edu.co/handle/20.500.11912/6237
• https://repository.upb.edu.co/handle/20.500.11912/8762
• https://repository.upb.edu.co/handle/20.500.11912/1077
• https://repository.upb.edu.co/handle/20.500.11912/5837
• https://repository.upb.edu.co/handle/20.500.11912/5514
• https://repository.upb.edu.co/handle/20.500.11912/5729
• https://repository.upb.edu.co/handle/20.500.11912/12221
• https://repository.upb.edu.co/handle/20.500.11912/4444
• https://repository.upb.edu.co/handle/20.500.11912/4273
• https://repository.upb.edu.co/handle/20.500.11912/9128
• https://repository.upb.edu.co/handle/20.500.11912/7219
• https://repository.upb.edu.co/handle/20.500.11912/9541
• https://repository.upb.edu.co/handle/20.500.11912/6287
• https://repository.upb.edu.co/handle/20.500.11912/5687
• https://repository.upb.edu.co/handle/20.500.11912/8624
• https://repository.upb.edu.co/handle/20.500.11912/12309
• https://repository.upb.edu.co/handle/20.500.11912/7646
• https://repository.upb.edu.co/handle/20.500.11912/9076
• https://repository.upb.edu.co/handle/20.500.11912/10068
• https://repository.upb.edu.co/handle/20.500.11912/7120
• https://repository.upb.edu.co/handle/20.500.11912/7215
• https://repository.upb.edu.co/handle/20.500.11912/10637
• https://repository.upb.edu.co/handle/20.500.11912/5821
• https://repository.upb.edu.co/handle/20.500.11912/6517
• https://repository.upb.edu.co/handle/20.500.11912/7200
• https://repository.upb.edu.co/handle/20.500.11912/4128
• https://repository.upb.edu.co/handle/20.500.11912/4976
• https://repository.upb.edu.co/handle/20.500.11912/8673
• https://repository.upb.edu.co/handle/20.500.11912/91
• https://repository.upb.edu.co/handle/20.500.11912/5770
• https://repository.upb.edu.co/handle/20.500.11912/6522
• https://repository.upb.edu.co/handle/20.500.11912/7792
• https://repository.upb.edu.co/handle/20.500.11912/1194
• https://repository.upb.edu.co/handle/20.500.11912/1366
• https://repository.upb.edu.co/handle/20.500.11912/12300
• https://repository.upb.edu.co/handle/20.500.11912/2071
• https://repository.upb.edu.co/handle/20.500.11912/6711
• https://repository.upb.edu.co/handle/20.500.11912/10493
• https://repository.upb.edu.co/handle/20.500.11912/10056
• https://repository.upb.edu.co/handle/20.500.11912/397
• https://repository.upb.edu.co/handle/20.500.11912/5541
• https://repository.upb.edu.co/handle/20.500.11912/8083
• https://repository.upb.edu.co/handle/20.500.11912/12209
• https://repository.upb.edu.co/handle/20.500.11912/488
• https://repository.upb.edu.co/handle/20.500.11912/3421
• https://repository.upb.edu.co/handle/20.500.11912/10818
• https://repository.upb.edu.co/handle/20.500.11912/5124
• https://repository.upb.edu.co/handle/20.500.11912/877
• https://repository.upb.edu.co/handle/20.500.11912/8749
• https://repository.upb.edu.co/handle/20.500.11912/4269
• https://repository.upb.edu.co/handle/20.500.11912/11815
• https://repository.upb.edu.co/handle/20.500.11912/1926
• https://repository.upb.edu.co/handle/20.500.11912/10593
• https://repository.upb.edu.co/handle/20.500.11912/11639
• https://repository.upb.edu.co/handle/20.500.11912/9164
• https://repository.upb.edu.co/handle/20.500.11912/11317
• https://repository.upb.edu.co/handle/20.500.11912/3725
• https://repository.upb.edu.co/handle/20.500.11912/4312
• https://repository.upb.edu.co/handle/20.500.11912/2133
• https://repository.upb.edu.co/handle/20.500.11912/6248
• https://repository.upb.edu.co/handle/20.500.11912/209
• https://repository.upb.edu.co/handle/20.500.11912/5860
• https://repository.upb.edu.co/handle/20.500.11912/1408
• https://repository.upb.edu.co/handle/20.500.11912/10245
• https://repository.upb.edu.co/handle/20.500.11912/854
• https://repository.upb.edu.co/handle/20.500.11912/1431
• https://repository.upb.edu.co/handle/20.500.11912/10092
• https://repository.upb.edu.co/handle/20.500.11912/2568
• https://repository.upb.edu.co/handle/20.500.11912/10455
• https://repository.upb.edu.co/handle/20.500.11912/1502
• https://repository.upb.edu.co/handle/20.500.11912/10994
• https://repository.upb.edu.co/handle/20.500.11912/370
• https://repository.upb.edu.co/handle/20.500.11912/2678
• https://repository.upb.edu.co/handle/20.500.11912/7891
• https://repository.upb.edu.co/handle/20.500.11912/4594
• https://repository.upb.edu.co/handle/20.500.11912/6082
• https://repository.upb.edu.co/handle/20.500.11912/8518
• https://repository.upb.edu.co/handle/20.500.11912/5227
• https://repository.upb.edu.co/handle/20.500.11912/10236
• https://repository.upb.edu.co/handle/20.500.11912/5486
• https://repository.upb.edu.co/handle/20.500.11912/3849
• https://repository.upb.edu.co/handle/20.500.11912/3148
• https://repository.upb.edu.co/handle/20.500.11912/1751
• https://repository.upb.edu.co/handle/20.500.11912/11331
• https://repository.upb.edu.co/handle/20.500.11912/11816
• https://repository.upb.edu.co/handle/20.500.11912/5018
• https://repository.upb.edu.co/handle/20.500.11912/4886
• https://repository.upb.edu.co/handle/20.500.11912/7931
• https://repository.upb.edu.co/handle/20.500.11912/11962
• https://repository.upb.edu.co/handle/20.500.11912/10921
• https://repository.upb.edu.co/handle/20.500.11912/4458
• https://repository.upb.edu.co/handle/20.500.11912/8414
• https://repository.upb.edu.co/handle/20.500.11912/11934
• https://repository.upb.edu.co/handle/20.500.11912/1290
• https://repository.upb.edu.co/handle/20.500.11912/6084
• https://repository.upb.edu.co/handle/20.500.11912/8704
• https://repository.upb.edu.co/handle/20.500.11912/7008
• https://repository.upb.edu.co/handle/20.500.11912/11892
• https://repository.upb.edu.co/handle/20.500.11912/2140
• https://repository.upb.edu.co/handle/20.500.11912/853
• https://repository.upb.edu.co/handle/20.500.11912/11841
• https://repository.upb.edu.co/handle/20.500.11912/4235
• https://repository.upb.edu.co/handle/20.500.11912/3166
• https://repository.upb.edu.co/handle/20.500.11912/4810
• https://repository.upb.edu.co/handle/20.500.11912/6052
• https://repository.upb.edu.co/handle/20.500.11912/11756
• https://repository.upb.edu.co/handle/20.500.11912/6134
• https://repository.upb.edu.co/handle/20.500.11912/2359
• https://repository.upb.edu.co/handle/20.500.11912/2250
• https://repository.upb.edu.co/handle/20.500.11912/12169
• https://repository.upb.edu.co/handle/20.500.11912/9378
• https://repository.upb.edu.co/handle/20.500.11912/11121
• https://repository.upb.edu.co/handle/20.500.11912/1986
• https://repository.upb.edu.co/handle/20.500.11912/5200
• https://repository.upb.edu.co/handle/20.500.11912/6329
• https://repository.upb.edu.co/handle/20.500.11912/410
• https://repository.upb.edu.co/handle/20.500.11912/564
• https://repository.upb.edu.co/handle/20.500.11912/3962
• https://repository.upb.edu.co/handle/20.500.11912/7837
• https://repository.upb.edu.co/handle/20.500.11912/2879
• https://repository.upb.edu.co/handle/20.500.11912/1034
• https://repository.upb.edu.co/handle/20.500.11912/6347
• https://repository.upb.edu.co/handle/20.500.11912/6749
• https://repository.upb.edu.co/handle/20.500.11912/11629
• https://repository.upb.edu.co/handle/20.500.11912/3709
• https://repository.upb.edu.co/handle/20.500.11912/239
• https://repository.upb.edu.co/handle/20.500.11912/8733
• https://repository.upb.edu.co/handle/20.500.11912/4046
• https://repository.upb.edu.co/handle/20.500.11912/10046
• https://repository.upb.edu.co/handle/20.500.11912/4485
• https://repository.upb.edu.co/handle/20.500.11912/7653
• https://repository.upb.edu.co/handle/20.500.11912/5634
• https://repository.upb.edu.co/handle/20.500.11912/11386
• https://repository.upb.edu.co/handle/20.500.11912/8379
• https://repository.upb.edu.co/handle/20.500.11912/9024
• https://repository.upb.edu.co/handle/20.500.11912/2053
• https://repository.upb.edu.co/handle/20.500.11912/9034
• https://repository.upb.edu.co/handle/20.500.11912/9819
• https://repository.upb.edu.co/handle/20.500.11912/3310
• https://repository.upb.edu.co/handle/20.500.11912/7418
• https://repository.upb.edu.co/handle/20.500.11912/837
• https://repository.upb.edu.co/handle/20.500.11912/6779
• https://repository.upb.edu.co/handle/20.500.11912/11159
• https://repository.upb.edu.co/handle/20.500.11912/3204
• https://repository.upb.edu.co/handle/20.500.11912/12323
• https://repository.upb.edu.co/handle/20.500.11912/6873
• https://repository.upb.edu.co/handle/20.500.11912/11094
• https://repository.upb.edu.co/handle/20.500.11912/9832
• https://repository.upb.edu.co/handle/20.500.11912/6033
• https://repository.upb.edu.co/handle/20.500.11912/11799
• https://repository.upb.edu.co/handle/20.500.11912/2408
• https://repository.upb.edu.co/handle/20.500.11912/5614
• https://repository.upb.edu.co/handle/20.500.11912/7549
• https://repository.upb.edu.co/handle/20.500.11912/3676
• https://repository.upb.edu.co/handle/20.500.11912/9045
• https://repository.upb.edu.co/handle/20.500.11912/5647
• https://repository.upb.edu.co/handle/20.500.11912/586
• https://repository.upb.edu.co/handle/20.500.11912/1330
• https://repository.upb.edu.co/handle/20.500.11912/7834
• https://repository.upb.edu.co/handle/20.500.11912/9621
• https://repository.upb.edu.co/handle/20.500.11912/9350
• https://repository.upb.edu.co/handle/20.500.11912/6348
• https://repository.upb.edu.co/handle/20.500.11912/9738
• https://repository.upb.edu.co/handle/20.500.11912/7641
• https://repository.upb.edu.co/handle/20.500.11912/1197
• https://repository.upb.edu.co/handle/20.500.11912/9263
• https://repository.upb.edu.co/handle/20.500.11912/1869
• https://repository.upb.edu.co/handle/20.500.11912/4956
• https://repository.upb.edu.co/handle/20.500.11912/6275
• https://repository.upb.edu.co/handle/20.500.11912/265
• https://repository.upb.edu.co/handle/20.500.11912/451
• https://repository.upb.edu.co/handle/20.500.11912/2105
• https://repository.upb.edu.co/handle/20.500.11912/3019
• https://repository.upb.edu.co/handle/20.500.11912/4599
• https://repository.upb.edu.co/handle/20.500.11912/2544
• https://repository.upb.edu.co/handle/20.500.11912/3335
• https://repository.upb.edu.co/handle/20.500.11912/9442
• https://repository.upb.edu.co/handle/20.500.11912/2525
• https://repository.upb.edu.co/handle/20.500.11912/12291
• https://repository.upb.edu.co/handle/20.500.11912/12252
• https://repository.upb.edu.co/handle/20.500.11912/12261
• https://repository.upb.edu.co/handle/20.500.11912/8805
• https://repository.upb.edu.co/handle/20.500.11912/9809
• https://repository.upb.edu.co/handle/20.500.11912/9579
• https://repository.upb.edu.co/handle/20.500.11912/8070
• https://repository.upb.edu.co/handle/20.500.11912/5404
• https://repository.upb.edu.co/handle/20.500.11912/7941
• https://repository.upb.edu.co/handle/20.500.11912/3735
• https://repository.upb.edu.co/handle/20.500.11912/10865
• https://repository.upb.edu.co/handle/20.500.11912/2380
• https://repository.upb.edu.co/handle/20.500.11912/11332
• https://repository.upb.edu.co/handle/20.500.11912/136
• https://repository.upb.edu.co/handle/20.500.11912/1495
• https://repository.upb.edu.co/handle/20.500.11912/10832
• https://repository.upb.edu.co/handle/20.500.11912/1004
• https://repository.upb.edu.co/handle/20.500.11912/1863
• https://repository.upb.edu.co/handle/20.500.11912/4034
• https://repository.upb.edu.co/handle/20.500.11912/1137
• https://repository.upb.edu.co/handle/20.500.11912/2827
• https://repository.upb.edu.co/handle/20.500.11912/3045
• https://repository.upb.edu.co/handle/20.500.11912/8689
• https://repository.upb.edu.co/handle/20.500.11912/6274
• https://repository.upb.edu.co/handle/20.500.11912/5433
• https://repository.upb.edu.co/handle/20.500.11912/1761
• https://repository.upb.edu.co/handle/20.500.11912/11993
• https://repository.upb.edu.co/handle/20.500.11912/1414
• https://repository.upb.edu.co/handle/20.500.11912/11538
• https://repository.upb.edu.co/handle/20.500.11912/1343
• https://repository.upb.edu.co/handle/20.500.11912/8625
• https://repository.upb.edu.co/handle/20.500.11912/12058
• https://repository.upb.edu.co/handle/20.500.11912/7237
• https://repository.upb.edu.co/handle/20.500.11912/9101
• https://repository.upb.edu.co/handle/20.500.11912/9031
• https://repository.upb.edu.co/handle/20.500.11912/2988
• https://repository.upb.edu.co/handle/20.500.11912/1251
• https://repository.upb.edu.co/handle/20.500.11912/7161
• https://repository.upb.edu.co/handle/20.500.11912/8797
• https://repository.upb.edu.co/handle/20.500.11912/10013
• https://repository.upb.edu.co/handle/20.500.11912/5000
• https://repository.upb.edu.co/handle/20.500.11912/425
• https://repository.upb.edu.co/handle/20.500.11912/760
• https://repository.upb.edu.co/handle/20.500.11912/10905
• https://repository.upb.edu.co/handle/20.500.11912/8244
• https://repository.upb.edu.co/handle/20.500.11912/1739
• https://repository.upb.edu.co/handle/20.500.11912/6023
• https://repository.upb.edu.co/handle/20.500.11912/2240
• https://repository.upb.edu.co/handle/20.500.11912/2624
• https://repository.upb.edu.co/handle/20.500.11912/4229
• https://repository.upb.edu.co/handle/20.500.11912/4887
• https://repository.upb.edu.co/handle/20.500.11912/12051
• https://repository.upb.edu.co/handle/20.500.11912/4401
• https://repository.upb.edu.co/handle/20.500.11912/10209
• https://repository.upb.edu.co/handle/20.500.11912/29
• https://repository.upb.edu.co/handle/20.500.11912/1843
• https://repository.upb.edu.co/handle/20.500.11912/6501
• https://repository.upb.edu.co/handle/20.500.11912/3752
• https://repository.upb.edu.co/handle/20.500.11912/6481
• https://repository.upb.edu.co/handle/20.500.11912/11241
• https://repository.upb.edu.co/handle/20.500.11912/8004
• https://repository.upb.edu.co/handle/20.500.11912/9041
• https://repository.upb.edu.co/handle/20.500.11912/5754
• https://repository.upb.edu.co/handle/20.500.11912/10843
• https://repository.upb.edu.co/handle/20.500.11912/10929
• https://repository.upb.edu.co/handle/20.500.11912/4426
• https://repository.upb.edu.co/handle/20.500.11912/7809
• https://repository.upb.edu.co/handle/20.500.11912/8512
• https://repository.upb.edu.co/handle/20.500.11912/5775
• https://repository.upb.edu.co/handle/20.500.11912/100
• https://repository.upb.edu.co/handle/20.500.11912/1069
• https://repository.upb.edu.co/handle/20.500.11912/3601
• https://repository.upb.edu.co/handle/20.500.11912/5825
• https://repository.upb.edu.co/handle/20.500.11912/968
• https://repository.upb.edu.co/handle/20.500.11912/4379
• https://repository.upb.edu.co/handle/20.500.11912/1321
• https://repository.upb.edu.co/handle/20.500.11912/10380
• https://repository.upb.edu.co/handle/20.500.11912/10539
• https://repository.upb.edu.co/handle/20.500.11912/6686
• https://repository.upb.edu.co/handle/20.500.11912/6712
• https://repository.upb.edu.co/handle/20.500.11912/2389
• https://repository.upb.edu.co/handle/20.500.11912/1248
• https://repository.upb.edu.co/handle/20.500.11912/2607
• https://repository.upb.edu.co/handle/20.500.11912/6557
• https://repository.upb.edu.co/handle/20.500.11912/4290
• https://repository.upb.edu.co/handle/20.500.11912/5249
• https://repository.upb.edu.co/handle/20.500.11912/9704
• https://repository.upb.edu.co/handle/20.500.11912/10977
• https://repository.upb.edu.co/handle/20.500.11912/5340
• https://repository.upb.edu.co/handle/20.500.11912/4843
• https://repository.upb.edu.co/handle/20.500.11912/2725
• https://repository.upb.edu.co/handle/20.500.11912/7203
• https://repository.upb.edu.co/handle/20.500.11912/10585
• https://repository.upb.edu.co/handle/20.500.11912/10320
• https://repository.upb.edu.co/handle/20.500.11912/3138
• https://repository.upb.edu.co/handle/20.500.11912/5123
• https://repository.upb.edu.co/handle/20.500.11912/3243
• https://repository.upb.edu.co/handle/20.500.11912/9156
• https://repository.upb.edu.co/handle/20.500.11912/3396
• https://repository.upb.edu.co/handle/20.500.11912/6193
• https://repository.upb.edu.co/handle/20.500.11912/4232
• https://repository.upb.edu.co/handle/20.500.11912/2957
• https://repository.upb.edu.co/handle/20.500.11912/2708
• https://repository.upb.edu.co/handle/20.500.11912/8406
• https://repository.upb.edu.co/handle/20.500.11912/1214
• https://repository.upb.edu.co/handle/20.500.11912/12177
• https://repository.upb.edu.co/handle/20.500.11912/1963
• https://repository.upb.edu.co/handle/20.500.11912/10876
• https://repository.upb.edu.co/handle/20.500.11912/5587
• https://repository.upb.edu.co/handle/20.500.11912/2556
• https://repository.upb.edu.co/handle/20.500.11912/5906
• https://repository.upb.edu.co/handle/20.500.11912/7013
• https://repository.upb.edu.co/handle/20.500.11912/4409
• https://repository.upb.edu.co/handle/20.500.11912/6789
• https://repository.upb.edu.co/handle/20.500.11912/9432
• https://repository.upb.edu.co/handle/20.500.11912/1318
• https://repository.upb.edu.co/handle/20.500.11912/6190
• https://repository.upb.edu.co/handle/20.500.11912/782
• https://repository.upb.edu.co/handle/20.500.11912/2819
• https://repository.upb.edu.co/handle/20.500.11912/737
• https://repository.upb.edu.co/handle/20.500.11912/4252
• https://repository.upb.edu.co/handle/20.500.11912/10176
• https://repository.upb.edu.co/handle/20.500.11912/11600
• https://repository.upb.edu.co/handle/20.500.11912/395
• https://repository.upb.edu.co/handle/20.500.11912/11065
• https://repository.upb.edu.co/handle/20.500.11912/2478