• https://repository.upb.edu.co/handle/20.500.11912/8873
• https://repository.upb.edu.co/handle/20.500.11912/9977
• https://repository.upb.edu.co/handle/20.500.11912/11439
• https://repository.upb.edu.co/handle/20.500.11912/6349
• https://repository.upb.edu.co/handle/20.500.11912/5656
• https://repository.upb.edu.co/handle/20.500.11912/11813
• https://repository.upb.edu.co/handle/20.500.11912/10417
• https://repository.upb.edu.co/handle/20.500.11912/8538
• https://repository.upb.edu.co/handle/20.500.11912/6759
• https://repository.upb.edu.co/handle/20.500.11912/7389
• https://repository.upb.edu.co/handle/20.500.11912/7015
• https://repository.upb.edu.co/handle/20.500.11912/1157
• https://repository.upb.edu.co/handle/20.500.11912/433
• https://repository.upb.edu.co/handle/20.500.11912/8494
• https://repository.upb.edu.co/handle/20.500.11912/2652
• https://repository.upb.edu.co/handle/20.500.11912/11128
• https://repository.upb.edu.co/handle/20.500.11912/11782
• https://repository.upb.edu.co/handle/20.500.11912/3556
• https://repository.upb.edu.co/handle/20.500.11912/1233
• https://repository.upb.edu.co/handle/20.500.11912/9657
• https://repository.upb.edu.co/handle/20.500.11912/10473
• https://repository.upb.edu.co/handle/20.500.11912/2869
• https://repository.upb.edu.co/handle/20.500.11912/1697
• https://repository.upb.edu.co/handle/20.500.11912/4680
• https://repository.upb.edu.co/handle/20.500.11912/8354
• https://repository.upb.edu.co/handle/20.500.11912/4580
• https://repository.upb.edu.co/handle/20.500.11912/12016
• https://repository.upb.edu.co/handle/20.500.11912/3309
• https://repository.upb.edu.co/handle/20.500.11912/10181
• https://repository.upb.edu.co/handle/20.500.11912/5050
• https://repository.upb.edu.co/handle/20.500.11912/10211
• https://repository.upb.edu.co/handle/20.500.11912/3460
• https://repository.upb.edu.co/handle/20.500.11912/9501
• https://repository.upb.edu.co/handle/20.500.11912/9692
• https://repository.upb.edu.co/handle/20.500.11912/841
• https://repository.upb.edu.co/handle/20.500.11912/11064
• https://repository.upb.edu.co/handle/20.500.11912/7869
• https://repository.upb.edu.co/handle/20.500.11912/4772
• https://repository.upb.edu.co/handle/20.500.11912/7185
• https://repository.upb.edu.co/handle/20.500.11912/11032
• https://repository.upb.edu.co/handle/20.500.11912/5924
• https://repository.upb.edu.co/handle/20.500.11912/595
• https://repository.upb.edu.co/handle/20.500.11912/9316
• https://repository.upb.edu.co/handle/20.500.11912/11805
• https://repository.upb.edu.co/handle/20.500.11912/10268
• https://repository.upb.edu.co/handle/20.500.11912/11672
• https://repository.upb.edu.co/handle/20.500.11912/11550
• https://repository.upb.edu.co/handle/20.500.11912/9487
• https://repository.upb.edu.co/handle/20.500.11912/5945
• https://repository.upb.edu.co/handle/20.500.11912/2477
• https://repository.upb.edu.co/handle/20.500.11912/2202
• https://repository.upb.edu.co/handle/20.500.11912/6172
• https://repository.upb.edu.co/handle/20.500.11912/2779
• https://repository.upb.edu.co/handle/20.500.11912/10483
• https://repository.upb.edu.co/handle/20.500.11912/8352
• https://repository.upb.edu.co/handle/20.500.11912/7766
• https://repository.upb.edu.co/handle/20.500.11912/3912
• https://repository.upb.edu.co/handle/20.500.11912/6918
• https://repository.upb.edu.co/handle/20.500.11912/1316
• https://repository.upb.edu.co/handle/20.500.11912/1965
• https://repository.upb.edu.co/handle/20.500.11912/9573
• https://repository.upb.edu.co/handle/20.500.11912/8216
• https://repository.upb.edu.co/handle/20.500.11912/9384
• https://repository.upb.edu.co/handle/20.500.11912/8725
• https://repository.upb.edu.co/handle/20.500.11912/3661
• https://repository.upb.edu.co/handle/20.500.11912/11323
• https://repository.upb.edu.co/handle/20.500.11912/8477
• https://repository.upb.edu.co/handle/20.500.11912/5008
• https://repository.upb.edu.co/handle/20.500.11912/7654
• https://repository.upb.edu.co/handle/20.500.11912/4315
• https://repository.upb.edu.co/handle/20.500.11912/2671
• https://repository.upb.edu.co/handle/20.500.11912/10622
• https://repository.upb.edu.co/handle/20.500.11912/9367
• https://repository.upb.edu.co/handle/20.500.11912/915
• https://repository.upb.edu.co/handle/20.500.11912/10228
• https://repository.upb.edu.co/handle/20.500.11912/2471
• https://repository.upb.edu.co/handle/20.500.11912/7757
• https://repository.upb.edu.co/handle/20.500.11912/10002
• https://repository.upb.edu.co/handle/20.500.11912/11731
• https://repository.upb.edu.co/handle/20.500.11912/9687
• https://repository.upb.edu.co/handle/20.500.11912/2610
• https://repository.upb.edu.co/handle/20.500.11912/12147
• https://repository.upb.edu.co/handle/20.500.11912/880
• https://repository.upb.edu.co/handle/20.500.11912/12072
• https://repository.upb.edu.co/handle/20.500.11912/7111
• https://repository.upb.edu.co/handle/20.500.11912/12094
• https://repository.upb.edu.co/handle/20.500.11912/10075
• https://repository.upb.edu.co/handle/20.500.11912/5582
• https://repository.upb.edu.co/handle/20.500.11912/5043
• https://repository.upb.edu.co/handle/20.500.11912/2603
• https://repository.upb.edu.co/handle/20.500.11912/11551
• https://repository.upb.edu.co/handle/20.500.11912/6390
• https://repository.upb.edu.co/handle/20.500.11912/7544
• https://repository.upb.edu.co/handle/20.500.11912/5666
• https://repository.upb.edu.co/handle/20.500.11912/2204
• https://repository.upb.edu.co/handle/20.500.11912/2696
• https://repository.upb.edu.co/handle/20.500.11912/7136
• https://repository.upb.edu.co/handle/20.500.11912/6059
• https://repository.upb.edu.co/handle/20.500.11912/9105
• https://repository.upb.edu.co/handle/20.500.11912/8548
• https://repository.upb.edu.co/handle/20.500.11912/7589
• https://repository.upb.edu.co/handle/20.500.11912/1396
• https://repository.upb.edu.co/handle/20.500.11912/8372
• https://repository.upb.edu.co/handle/20.500.11912/6866
• https://repository.upb.edu.co/handle/20.500.11912/10253
• https://repository.upb.edu.co/handle/20.500.11912/9852
• https://repository.upb.edu.co/handle/20.500.11912/6591
• https://repository.upb.edu.co/handle/20.500.11912/6314
• https://repository.upb.edu.co/handle/20.500.11912/7336
• https://repository.upb.edu.co/handle/20.500.11912/2639
• https://repository.upb.edu.co/handle/20.500.11912/8092
• https://repository.upb.edu.co/handle/20.500.11912/8419
• https://repository.upb.edu.co/handle/20.500.11912/11560
• https://repository.upb.edu.co/handle/20.500.11912/10434
• https://repository.upb.edu.co/handle/20.500.11912/6518
• https://repository.upb.edu.co/handle/20.500.11912/10431
• https://repository.upb.edu.co/handle/20.500.11912/8149
• https://repository.upb.edu.co/handle/20.500.11912/11912
• https://repository.upb.edu.co/handle/20.500.11912/7089
• https://repository.upb.edu.co/handle/20.500.11912/8356
• https://repository.upb.edu.co/handle/20.500.11912/9973
• https://repository.upb.edu.co/handle/20.500.11912/4892
• https://repository.upb.edu.co/handle/20.500.11912/5508
• https://repository.upb.edu.co/handle/20.500.11912/5618
• https://repository.upb.edu.co/handle/20.500.11912/4434
• https://repository.upb.edu.co/handle/20.500.11912/8350
• https://repository.upb.edu.co/handle/20.500.11912/11608
• https://repository.upb.edu.co/handle/20.500.11912/9918
• https://repository.upb.edu.co/handle/20.500.11912/5290
• https://repository.upb.edu.co/handle/20.500.11912/1896
• https://repository.upb.edu.co/handle/20.500.11912/9979
• https://repository.upb.edu.co/handle/20.500.11912/2084
• https://repository.upb.edu.co/handle/20.500.11912/5645
• https://repository.upb.edu.co/handle/20.500.11912/10959
• https://repository.upb.edu.co/handle/20.500.11912/7152
• https://repository.upb.edu.co/handle/20.500.11912/6585
• https://repository.upb.edu.co/handle/20.500.11912/5583
• https://repository.upb.edu.co/handle/20.500.11912/11512
• https://repository.upb.edu.co/handle/20.500.11912/2804
• https://repository.upb.edu.co/handle/20.500.11912/4221
• https://repository.upb.edu.co/handle/20.500.11912/5216
• https://repository.upb.edu.co/handle/20.500.11912/10529
• https://repository.upb.edu.co/handle/20.500.11912/10367
• https://repository.upb.edu.co/handle/20.500.11912/3600
• https://repository.upb.edu.co/handle/20.500.11912/994
• https://repository.upb.edu.co/handle/20.500.11912/11738
• https://repository.upb.edu.co/handle/20.500.11912/9548
• https://repository.upb.edu.co/handle/20.500.11912/10995
• https://repository.upb.edu.co/handle/20.500.11912/3165
• https://repository.upb.edu.co/handle/20.500.11912/10801
• https://repository.upb.edu.co/handle/20.500.11912/8202
• https://repository.upb.edu.co/handle/20.500.11912/1523
• https://repository.upb.edu.co/handle/20.500.11912/633
• https://repository.upb.edu.co/handle/20.500.11912/6844
• https://repository.upb.edu.co/handle/20.500.11912/11345
• https://repository.upb.edu.co/handle/20.500.11912/6328
• https://repository.upb.edu.co/handle/20.500.11912/9496
• https://repository.upb.edu.co/handle/20.500.11912/5617
• https://repository.upb.edu.co/handle/20.500.11912/7939
• https://repository.upb.edu.co/handle/20.500.11912/10653
• https://repository.upb.edu.co/handle/20.500.11912/567
• https://repository.upb.edu.co/handle/20.500.11912/9803
• https://repository.upb.edu.co/handle/20.500.11912/1660
• https://repository.upb.edu.co/handle/20.500.11912/10023
• https://repository.upb.edu.co/handle/20.500.11912/8522
• https://repository.upb.edu.co/handle/20.500.11912/5977
• https://repository.upb.edu.co/handle/20.500.11912/7862
• https://repository.upb.edu.co/handle/20.500.11912/11452
• https://repository.upb.edu.co/handle/20.500.11912/3494
• https://repository.upb.edu.co/handle/20.500.11912/1395
• https://repository.upb.edu.co/handle/20.500.11912/11622
• https://repository.upb.edu.co/handle/20.500.11912/828
• https://repository.upb.edu.co/handle/20.500.11912/3682
• https://repository.upb.edu.co/handle/20.500.11912/997
• https://repository.upb.edu.co/handle/20.500.11912/12132
• https://repository.upb.edu.co/handle/20.500.11912/10183
• https://repository.upb.edu.co/handle/20.500.11912/4731
• https://repository.upb.edu.co/handle/20.500.11912/3683
• https://repository.upb.edu.co/handle/20.500.11912/11342
• https://repository.upb.edu.co/handle/20.500.11912/7051
• https://repository.upb.edu.co/handle/20.500.11912/1451
• https://repository.upb.edu.co/handle/20.500.11912/11626
• https://repository.upb.edu.co/handle/20.500.11912/4734
• https://repository.upb.edu.co/handle/20.500.11912/6290
• https://repository.upb.edu.co/handle/20.500.11912/6279
• https://repository.upb.edu.co/handle/20.500.11912/10531
• https://repository.upb.edu.co/handle/20.500.11912/11880
• https://repository.upb.edu.co/handle/20.500.11912/2413
• https://repository.upb.edu.co/handle/20.500.11912/6547
• https://repository.upb.edu.co/handle/20.500.11912/7843
• https://repository.upb.edu.co/handle/20.500.11912/2617
• https://repository.upb.edu.co/handle/20.500.11912/3315
• https://repository.upb.edu.co/handle/20.500.11912/352
• https://repository.upb.edu.co/handle/20.500.11912/2840
• https://repository.upb.edu.co/handle/20.500.11912/2591
• https://repository.upb.edu.co/handle/20.500.11912/1362
• https://repository.upb.edu.co/handle/20.500.11912/2866
• https://repository.upb.edu.co/handle/20.500.11912/11226
• https://repository.upb.edu.co/handle/20.500.11912/1351
• https://repository.upb.edu.co/handle/20.500.11912/5691
• https://repository.upb.edu.co/handle/20.500.11912/7667
• https://repository.upb.edu.co/handle/20.500.11912/5185
• https://repository.upb.edu.co/handle/20.500.11912/6593
• https://repository.upb.edu.co/handle/20.500.11912/11983
• https://repository.upb.edu.co/handle/20.500.11912/7874
• https://repository.upb.edu.co/handle/20.500.11912/4849
• https://repository.upb.edu.co/handle/20.500.11912/1616
• https://repository.upb.edu.co/handle/20.500.11912/11435
• https://repository.upb.edu.co/handle/20.500.11912/794
• https://repository.upb.edu.co/handle/20.500.11912/3882
• https://repository.upb.edu.co/handle/20.500.11912/11409
• https://repository.upb.edu.co/handle/20.500.11912/3249
• https://repository.upb.edu.co/handle/20.500.11912/2384
• https://repository.upb.edu.co/handle/20.500.11912/10150
• https://repository.upb.edu.co/handle/20.500.11912/11804
• https://repository.upb.edu.co/handle/20.500.11912/1359
• https://repository.upb.edu.co/handle/20.500.11912/8091
• https://repository.upb.edu.co/handle/20.500.11912/1539
• https://repository.upb.edu.co/handle/20.500.11912/1826
• https://repository.upb.edu.co/handle/20.500.11912/11613
• https://repository.upb.edu.co/handle/20.500.11912/8303
• https://repository.upb.edu.co/handle/20.500.11912/9323
• https://repository.upb.edu.co/handle/20.500.11912/10207
• https://repository.upb.edu.co/handle/20.500.11912/8595
• https://repository.upb.edu.co/handle/20.500.11912/9456
• https://repository.upb.edu.co/handle/20.500.11912/121
• https://repository.upb.edu.co/handle/20.500.11912/5173
• https://repository.upb.edu.co/handle/20.500.11912/6415
• https://repository.upb.edu.co/handle/20.500.11912/4083
• https://repository.upb.edu.co/handle/20.500.11912/10101
• https://repository.upb.edu.co/handle/20.500.11912/1556
• https://repository.upb.edu.co/handle/20.500.11912/11423
• https://repository.upb.edu.co/handle/20.500.11912/9651
• https://repository.upb.edu.co/handle/20.500.11912/422
• https://repository.upb.edu.co/handle/20.500.11912/8433
• https://repository.upb.edu.co/handle/20.500.11912/3671
• https://repository.upb.edu.co/handle/20.500.11912/10860
• https://repository.upb.edu.co/handle/20.500.11912/2247
• https://repository.upb.edu.co/handle/20.500.11912/4205
• https://repository.upb.edu.co/handle/20.500.11912/4237
• https://repository.upb.edu.co/handle/20.500.11912/5589
• https://repository.upb.edu.co/handle/20.500.11912/11521
• https://repository.upb.edu.co/handle/20.500.11912/1837
• https://repository.upb.edu.co/handle/20.500.11912/5695
• https://repository.upb.edu.co/handle/20.500.11912/7277
• https://repository.upb.edu.co/handle/20.500.11912/10435
• https://repository.upb.edu.co/handle/20.500.11912/3403
• https://repository.upb.edu.co/handle/20.500.11912/8599
• https://repository.upb.edu.co/handle/20.500.11912/7012
• https://repository.upb.edu.co/handle/20.500.11912/3995
• https://repository.upb.edu.co/handle/20.500.11912/5607
• https://repository.upb.edu.co/handle/20.500.11912/7084
• https://repository.upb.edu.co/handle/20.500.11912/6194
• https://repository.upb.edu.co/handle/20.500.11912/1559
• https://repository.upb.edu.co/handle/20.500.11912/1945
• https://repository.upb.edu.co/handle/20.500.11912/2058
• https://repository.upb.edu.co/handle/20.500.11912/7036
• https://repository.upb.edu.co/handle/20.500.11912/4415
• https://repository.upb.edu.co/handle/20.500.11912/9556
• https://repository.upb.edu.co/handle/20.500.11912/7764
• https://repository.upb.edu.co/handle/20.500.11912/2332
• https://repository.upb.edu.co/handle/20.500.11912/2106
• https://repository.upb.edu.co/handle/20.500.11912/11758
• https://repository.upb.edu.co/handle/20.500.11912/9683
• https://repository.upb.edu.co/handle/20.500.11912/9602
• https://repository.upb.edu.co/handle/20.500.11912/9033
• https://repository.upb.edu.co/handle/20.500.11912/3895
• https://repository.upb.edu.co/handle/20.500.11912/8715
• https://repository.upb.edu.co/handle/20.500.11912/462
• https://repository.upb.edu.co/handle/20.500.11912/4958
• https://repository.upb.edu.co/handle/20.500.11912/8828
• https://repository.upb.edu.co/handle/20.500.11912/1131
• https://repository.upb.edu.co/handle/20.500.11912/5449
• https://repository.upb.edu.co/handle/20.500.11912/10083
• https://repository.upb.edu.co/handle/20.500.11912/11854
• https://repository.upb.edu.co/handle/20.500.11912/7446
• https://repository.upb.edu.co/handle/20.500.11912/11048
• https://repository.upb.edu.co/handle/20.500.11912/3447
• https://repository.upb.edu.co/handle/20.500.11912/6359
• https://repository.upb.edu.co/handle/20.500.11912/6896
• https://repository.upb.edu.co/handle/20.500.11912/8329
• https://repository.upb.edu.co/handle/20.500.11912/2016
• https://repository.upb.edu.co/handle/20.500.11912/8808
• https://repository.upb.edu.co/handle/20.500.11912/4502
• https://repository.upb.edu.co/handle/20.500.11912/2794
• https://repository.upb.edu.co/handle/20.500.11912/912
• https://repository.upb.edu.co/handle/20.500.11912/932
• https://repository.upb.edu.co/handle/20.500.11912/9654
• https://repository.upb.edu.co/handle/20.500.11912/11590
• https://repository.upb.edu.co/handle/20.500.11912/5009
• https://repository.upb.edu.co/handle/20.500.11912/1029
• https://repository.upb.edu.co/handle/20.500.11912/1115
• https://repository.upb.edu.co/handle/20.500.11912/4478
• https://repository.upb.edu.co/handle/20.500.11912/9505
• https://repository.upb.edu.co/handle/20.500.11912/10122
• https://repository.upb.edu.co/handle/20.500.11912/8807
• https://repository.upb.edu.co/handle/20.500.11912/10162
• https://repository.upb.edu.co/handle/20.500.11912/3455
• https://repository.upb.edu.co/handle/20.500.11912/8730
• https://repository.upb.edu.co/handle/20.500.11912/11937
• https://repository.upb.edu.co/handle/20.500.11912/7334
• https://repository.upb.edu.co/handle/20.500.11912/867
• https://repository.upb.edu.co/handle/20.500.11912/11203
• https://repository.upb.edu.co/handle/20.500.11912/6748
• https://repository.upb.edu.co/handle/20.500.11912/123
• https://repository.upb.edu.co/handle/20.500.11912/3357
• https://repository.upb.edu.co/handle/20.500.11912/10325
• https://repository.upb.edu.co/handle/20.500.11912/7978
• https://repository.upb.edu.co/handle/20.500.11912/6273
• https://repository.upb.edu.co/handle/20.500.11912/11803
• https://repository.upb.edu.co/handle/20.500.11912/11909
• https://repository.upb.edu.co/handle/20.500.11912/6511
• https://repository.upb.edu.co/handle/20.500.11912/5974
• https://repository.upb.edu.co/handle/20.500.11912/2817
• https://repository.upb.edu.co/handle/20.500.11912/4973
• https://repository.upb.edu.co/handle/20.500.11912/9737
• https://repository.upb.edu.co/handle/20.500.11912/4436
• https://repository.upb.edu.co/handle/20.500.11912/5337
• https://repository.upb.edu.co/handle/20.500.11912/5760
• https://repository.upb.edu.co/handle/20.500.11912/9939
• https://repository.upb.edu.co/handle/20.500.11912/4869
• https://repository.upb.edu.co/handle/20.500.11912/1125
• https://repository.upb.edu.co/handle/20.500.11912/8602
• https://repository.upb.edu.co/handle/20.500.11912/7974
• https://repository.upb.edu.co/handle/20.500.11912/11598
• https://repository.upb.edu.co/handle/20.500.11912/555
• https://repository.upb.edu.co/handle/20.500.11912/7488
• https://repository.upb.edu.co/handle/20.500.11912/7458
• https://repository.upb.edu.co/handle/20.500.11912/8654
• https://repository.upb.edu.co/handle/20.500.11912/216
• https://repository.upb.edu.co/handle/20.500.11912/5488
• https://repository.upb.edu.co/handle/20.500.11912/7206
• https://repository.upb.edu.co/handle/20.500.11912/9697
• https://repository.upb.edu.co/handle/20.500.11912/4875
• https://repository.upb.edu.co/handle/20.500.11912/5829
• https://repository.upb.edu.co/handle/20.500.11912/508
• https://repository.upb.edu.co/handle/20.500.11912/7392
• https://repository.upb.edu.co/handle/20.500.11912/3172
• https://repository.upb.edu.co/handle/20.500.11912/8830
• https://repository.upb.edu.co/handle/20.500.11912/10348
• https://repository.upb.edu.co/handle/20.500.11912/8921
• https://repository.upb.edu.co/handle/20.500.11912/1071
• https://repository.upb.edu.co/handle/20.500.11912/6251
• https://repository.upb.edu.co/handle/20.500.11912/2439
• https://repository.upb.edu.co/handle/20.500.11912/4962
• https://repository.upb.edu.co/handle/20.500.11912/11774
• https://repository.upb.edu.co/handle/20.500.11912/10898
• https://repository.upb.edu.co/handle/20.500.11912/10409
• https://repository.upb.edu.co/handle/20.500.11912/2194
• https://repository.upb.edu.co/handle/20.500.11912/196
• https://repository.upb.edu.co/handle/20.500.11912/8369
• https://repository.upb.edu.co/handle/20.500.11912/1505
• https://repository.upb.edu.co/handle/20.500.11912/7344
• https://repository.upb.edu.co/handle/20.500.11912/3964
• https://repository.upb.edu.co/handle/20.500.11912/2886
• https://repository.upb.edu.co/handle/20.500.11912/1726
• https://repository.upb.edu.co/handle/20.500.11912/10328
• https://repository.upb.edu.co/handle/20.500.11912/6327
• https://repository.upb.edu.co/handle/20.500.11912/5358
• https://repository.upb.edu.co/handle/20.500.11912/233
• https://repository.upb.edu.co/handle/20.500.11912/3724
• https://repository.upb.edu.co/handle/20.500.11912/9055
• https://repository.upb.edu.co/handle/20.500.11912/9255
• https://repository.upb.edu.co/handle/20.500.11912/6147
• https://repository.upb.edu.co/handle/20.500.11912/10850
• https://repository.upb.edu.co/handle/20.500.11912/10802
• https://repository.upb.edu.co/handle/20.500.11912/4331
• https://repository.upb.edu.co/handle/20.500.11912/9598
• https://repository.upb.edu.co/handle/20.500.11912/8038
• https://repository.upb.edu.co/handle/20.500.11912/8718
• https://repository.upb.edu.co/handle/20.500.11912/6444
• https://repository.upb.edu.co/handle/20.500.11912/1748
• https://repository.upb.edu.co/handle/20.500.11912/9231
• https://repository.upb.edu.co/handle/20.500.11912/1928
• https://repository.upb.edu.co/handle/20.500.11912/1306
• https://repository.upb.edu.co/handle/20.500.11912/6339
• https://repository.upb.edu.co/handle/20.500.11912/9260
• https://repository.upb.edu.co/handle/20.500.11912/3021
• https://repository.upb.edu.co/handle/20.500.11912/10988
• https://repository.upb.edu.co/handle/20.500.11912/11393
• https://repository.upb.edu.co/handle/20.500.11912/5235
• https://repository.upb.edu.co/handle/20.500.11912/2430