• https://repository.upb.edu.co/handle/20.500.11912/7061
• https://repository.upb.edu.co/handle/20.500.11912/8506
• https://repository.upb.edu.co/handle/20.500.11912/5842
• https://repository.upb.edu.co/handle/20.500.11912/8691
• https://repository.upb.edu.co/handle/20.500.11912/10666
• https://repository.upb.edu.co/handle/20.500.11912/1627
• https://repository.upb.edu.co/handle/20.500.11912/3848
• https://repository.upb.edu.co/handle/20.500.11912/9421
• https://repository.upb.edu.co/handle/20.500.11912/10834
• https://repository.upb.edu.co/handle/20.500.11912/11115
• https://repository.upb.edu.co/handle/20.500.11912/3400
• https://repository.upb.edu.co/handle/20.500.11912/9843
• https://repository.upb.edu.co/handle/20.500.11912/10852
• https://repository.upb.edu.co/handle/20.500.11912/3060
• https://repository.upb.edu.co/handle/20.500.11912/12108
• https://repository.upb.edu.co/handle/20.500.11912/628
• https://repository.upb.edu.co/handle/20.500.11912/7693
• https://repository.upb.edu.co/handle/20.500.11912/659
• https://repository.upb.edu.co/handle/20.500.11912/1540
• https://repository.upb.edu.co/handle/20.500.11912/2303
• https://repository.upb.edu.co/handle/20.500.11912/651
• https://repository.upb.edu.co/handle/20.500.11912/8811
• https://repository.upb.edu.co/handle/20.500.11912/4920
• https://repository.upb.edu.co/handle/20.500.11912/4114
• https://repository.upb.edu.co/handle/20.500.11912/10629
• https://repository.upb.edu.co/handle/20.500.11912/7714
• https://repository.upb.edu.co/handle/20.500.11912/7824
• https://repository.upb.edu.co/handle/20.500.11912/2178
• https://repository.upb.edu.co/handle/20.500.11912/1269
• https://repository.upb.edu.co/handle/20.500.11912/11851
• https://repository.upb.edu.co/handle/20.500.11912/1143
• https://repository.upb.edu.co/handle/20.500.11912/5119
• https://repository.upb.edu.co/handle/20.500.11912/5639
• https://repository.upb.edu.co/handle/20.500.11912/3366
• https://repository.upb.edu.co/handle/20.500.11912/9976
• https://repository.upb.edu.co/handle/20.500.11912/9648
• https://repository.upb.edu.co/handle/20.500.11912/7246
• https://repository.upb.edu.co/handle/20.500.11912/6259
• https://repository.upb.edu.co/handle/20.500.11912/2546
• https://repository.upb.edu.co/handle/20.500.11912/2164
• https://repository.upb.edu.co/handle/20.500.11912/11725
• https://repository.upb.edu.co/handle/20.500.11912/6513
• https://repository.upb.edu.co/handle/20.500.11912/2681
• https://repository.upb.edu.co/handle/20.500.11912/5011
• https://repository.upb.edu.co/handle/20.500.11912/12002
• https://repository.upb.edu.co/handle/20.500.11912/2207
• https://repository.upb.edu.co/handle/20.500.11912/5204
• https://repository.upb.edu.co/handle/20.500.11912/2315
• https://repository.upb.edu.co/handle/20.500.11912/8315
• https://repository.upb.edu.co/handle/20.500.11912/1201
• https://repository.upb.edu.co/handle/20.500.11912/4572
• https://repository.upb.edu.co/handle/20.500.11912/6910
• https://repository.upb.edu.co/handle/20.500.11912/9302
• https://repository.upb.edu.co/handle/20.500.11912/3513
• https://repository.upb.edu.co/handle/20.500.11912/2955
• https://repository.upb.edu.co/handle/20.500.11912/1967
• https://repository.upb.edu.co/handle/20.500.11912/5498
• https://repository.upb.edu.co/handle/20.500.11912/6341
• https://repository.upb.edu.co/handle/20.500.11912/5503
• https://repository.upb.edu.co/handle/20.500.11912/11596
• https://repository.upb.edu.co/handle/20.500.11912/3144
• https://repository.upb.edu.co/handle/20.500.11912/10204
• https://repository.upb.edu.co/handle/20.500.11912/1036
• https://repository.upb.edu.co/handle/20.500.11912/5580
• https://repository.upb.edu.co/handle/20.500.11912/8032
• https://repository.upb.edu.co/handle/20.500.11912/6631
• https://repository.upb.edu.co/handle/20.500.11912/379
• https://repository.upb.edu.co/handle/20.500.11912/1256
• https://repository.upb.edu.co/handle/20.500.11912/6467
• https://repository.upb.edu.co/handle/20.500.11912/2092
• https://repository.upb.edu.co/handle/20.500.11912/3014
• https://repository.upb.edu.co/handle/20.500.11912/6039
• https://repository.upb.edu.co/handle/20.500.11912/10457
• https://repository.upb.edu.co/handle/20.500.11912/9508
• https://repository.upb.edu.co/handle/20.500.11912/6823
• https://repository.upb.edu.co/handle/20.500.11912/7132
• https://repository.upb.edu.co/handle/20.500.11912/5278
• https://repository.upb.edu.co/handle/20.500.11912/9500
• https://repository.upb.edu.co/handle/20.500.11912/10941
• https://repository.upb.edu.co/handle/20.500.11912/1365
• https://repository.upb.edu.co/handle/20.500.11912/132
• https://repository.upb.edu.co/handle/20.500.11912/5327
• https://repository.upb.edu.co/handle/20.500.11912/8978
• https://repository.upb.edu.co/handle/20.500.11912/7167
• https://repository.upb.edu.co/handle/20.500.11912/10939
• https://repository.upb.edu.co/handle/20.500.11912/11720
• https://repository.upb.edu.co/handle/20.500.11912/3944
• https://repository.upb.edu.co/handle/20.500.11912/976
• https://repository.upb.edu.co/handle/20.500.11912/2674
• https://repository.upb.edu.co/handle/20.500.11912/1784
• https://repository.upb.edu.co/handle/20.500.11912/5749
• https://repository.upb.edu.co/handle/20.500.11912/812
• https://repository.upb.edu.co/handle/20.500.11912/4087
• https://repository.upb.edu.co/handle/20.500.11912/4837
• https://repository.upb.edu.co/handle/20.500.11912/1424
• https://repository.upb.edu.co/handle/20.500.11912/1292
• https://repository.upb.edu.co/handle/20.500.11912/6095
• https://repository.upb.edu.co/handle/20.500.11912/3470
• https://repository.upb.edu.co/handle/20.500.11912/1861
• https://repository.upb.edu.co/handle/20.500.11912/11547
• https://repository.upb.edu.co/handle/20.500.11912/8418
• https://repository.upb.edu.co/handle/20.500.11912/9254
• https://repository.upb.edu.co/handle/20.500.11912/2119
• https://repository.upb.edu.co/handle/20.500.11912/2397
• https://repository.upb.edu.co/handle/20.500.11912/8105
• https://repository.upb.edu.co/handle/20.500.11912/8735
• https://repository.upb.edu.co/handle/20.500.11912/9016
• https://repository.upb.edu.co/handle/20.500.11912/706
• https://repository.upb.edu.co/handle/20.500.11912/6456
• https://repository.upb.edu.co/handle/20.500.11912/8153
• https://repository.upb.edu.co/handle/20.500.11912/6431
• https://repository.upb.edu.co/handle/20.500.11912/11086
• https://repository.upb.edu.co/handle/20.500.11912/1792
• https://repository.upb.edu.co/handle/20.500.11912/8722
• https://repository.upb.edu.co/handle/20.500.11912/3636
• https://repository.upb.edu.co/handle/20.500.11912/2109
• https://repository.upb.edu.co/handle/20.500.11912/9536
• https://repository.upb.edu.co/handle/20.500.11912/3610
• https://repository.upb.edu.co/handle/20.500.11912/7238
• https://repository.upb.edu.co/handle/20.500.11912/10132
• https://repository.upb.edu.co/handle/20.500.11912/573
• https://repository.upb.edu.co/handle/20.500.11912/3802
• https://repository.upb.edu.co/handle/20.500.11912/933
• https://repository.upb.edu.co/handle/20.500.11912/6164
• https://repository.upb.edu.co/handle/20.500.11912/4955
• https://repository.upb.edu.co/handle/20.500.11912/1055
• https://repository.upb.edu.co/handle/20.500.11912/3046
• https://repository.upb.edu.co/handle/20.500.11912/11213
• https://repository.upb.edu.co/handle/20.500.11912/7581
• https://repository.upb.edu.co/handle/20.500.11912/1776
• https://repository.upb.edu.co/handle/20.500.11912/1651
• https://repository.upb.edu.co/handle/20.500.11912/5367
• https://repository.upb.edu.co/handle/20.500.11912/7782
• https://repository.upb.edu.co/handle/20.500.11912/4187
• https://repository.upb.edu.co/handle/20.500.11912/10334
• https://repository.upb.edu.co/handle/20.500.11912/884
• https://repository.upb.edu.co/handle/20.500.11912/3367
• https://repository.upb.edu.co/handle/20.500.11912/9872
• https://repository.upb.edu.co/handle/20.500.11912/1009
• https://repository.upb.edu.co/handle/20.500.11912/8053
• https://repository.upb.edu.co/handle/20.500.11912/8366
• https://repository.upb.edu.co/handle/20.500.11912/11568
• https://repository.upb.edu.co/handle/20.500.11912/4450
• https://repository.upb.edu.co/handle/20.500.11912/2069
• https://repository.upb.edu.co/handle/20.500.11912/8147
• https://repository.upb.edu.co/handle/20.500.11912/150
• https://repository.upb.edu.co/handle/20.500.11912/52
• https://repository.upb.edu.co/handle/20.500.11912/12064
• https://repository.upb.edu.co/handle/20.500.11912/3937
• https://repository.upb.edu.co/handle/20.500.11912/12101
• https://repository.upb.edu.co/handle/20.500.11912/1052
• https://repository.upb.edu.co/handle/20.500.11912/8902
• https://repository.upb.edu.co/handle/20.500.11912/3553
• https://repository.upb.edu.co/handle/20.500.11912/11849
• https://repository.upb.edu.co/handle/20.500.11912/9779
• https://repository.upb.edu.co/handle/20.500.11912/1579
• https://repository.upb.edu.co/handle/20.500.11912/744
• https://repository.upb.edu.co/handle/20.500.11912/4414
• https://repository.upb.edu.co/handle/20.500.11912/5074
• https://repository.upb.edu.co/handle/20.500.11912/6028
• https://repository.upb.edu.co/handle/20.500.11912/2631
• https://repository.upb.edu.co/handle/20.500.11912/2367
• https://repository.upb.edu.co/handle/20.500.11912/6565
• https://repository.upb.edu.co/handle/20.500.11912/2027
• https://repository.upb.edu.co/handle/20.500.11912/4963
• https://repository.upb.edu.co/handle/20.500.11912/11845
• https://repository.upb.edu.co/handle/20.500.11912/5556
• https://repository.upb.edu.co/handle/20.500.11912/9492
• https://repository.upb.edu.co/handle/20.500.11912/9232
• https://repository.upb.edu.co/handle/20.500.11912/1074
• https://repository.upb.edu.co/handle/20.500.11912/8756
• https://repository.upb.edu.co/handle/20.500.11912/4039
• https://repository.upb.edu.co/handle/20.500.11912/5422
• https://repository.upb.edu.co/handle/20.500.11912/9802
• https://repository.upb.edu.co/handle/20.500.11912/7378
• https://repository.upb.edu.co/handle/20.500.11912/9605
• https://repository.upb.edu.co/handle/20.500.11912/1199
• https://repository.upb.edu.co/handle/20.500.11912/1961
• https://repository.upb.edu.co/handle/20.500.11912/3832
• https://repository.upb.edu.co/handle/20.500.11912/3378
• https://repository.upb.edu.co/handle/20.500.11912/1079
• https://repository.upb.edu.co/handle/20.500.11912/6592
• https://repository.upb.edu.co/handle/20.500.11912/3196
• https://repository.upb.edu.co/handle/20.500.11912/1557
• https://repository.upb.edu.co/handle/20.500.11912/7449
• https://repository.upb.edu.co/handle/20.500.11912/5497
• https://repository.upb.edu.co/handle/20.500.11912/1582
• https://repository.upb.edu.co/handle/20.500.11912/7014
• https://repository.upb.edu.co/handle/20.500.11912/11432
• https://repository.upb.edu.co/handle/20.500.11912/3649
• https://repository.upb.edu.co/handle/20.500.11912/6211
• https://repository.upb.edu.co/handle/20.500.11912/8106
• https://repository.upb.edu.co/handle/20.500.11912/11514
• https://repository.upb.edu.co/handle/20.500.11912/5588
• https://repository.upb.edu.co/handle/20.500.11912/2884
• https://repository.upb.edu.co/handle/20.500.11912/9702
• https://repository.upb.edu.co/handle/20.500.11912/10575
• https://repository.upb.edu.co/handle/20.500.11912/7146
• https://repository.upb.edu.co/handle/20.500.11912/12006
• https://repository.upb.edu.co/handle/20.500.11912/9825
• https://repository.upb.edu.co/handle/20.500.11912/4596
• https://repository.upb.edu.co/handle/20.500.11912/3582
• https://repository.upb.edu.co/handle/20.500.11912/2110
• https://repository.upb.edu.co/handle/20.500.11912/7489
• https://repository.upb.edu.co/handle/20.500.11912/579
• https://repository.upb.edu.co/handle/20.500.11912/959
• https://repository.upb.edu.co/handle/20.500.11912/7730
• https://repository.upb.edu.co/handle/20.500.11912/8913
• https://repository.upb.edu.co/handle/20.500.11912/8097
• https://repository.upb.edu.co/handle/20.500.11912/7959
• https://repository.upb.edu.co/handle/20.500.11912/5044
• https://repository.upb.edu.co/handle/20.500.11912/6848
• https://repository.upb.edu.co/handle/20.500.11912/10837
• https://repository.upb.edu.co/handle/20.500.11912/993
• https://repository.upb.edu.co/handle/20.500.11912/11109
• https://repository.upb.edu.co/handle/20.500.11912/1580
• https://repository.upb.edu.co/handle/20.500.11912/5445
• https://repository.upb.edu.co/handle/20.500.11912/5211
• https://repository.upb.edu.co/handle/20.500.11912/7852
• https://repository.upb.edu.co/handle/20.500.11912/8323
• https://repository.upb.edu.co/handle/20.500.11912/5061
• https://repository.upb.edu.co/handle/20.500.11912/2473
• https://repository.upb.edu.co/handle/20.500.11912/10064
• https://repository.upb.edu.co/handle/20.500.11912/10195
• https://repository.upb.edu.co/handle/20.500.11912/11764
• https://repository.upb.edu.co/handle/20.500.11912/5304
• https://repository.upb.edu.co/handle/20.500.11912/1985
• https://repository.upb.edu.co/handle/20.500.11912/5868
• https://repository.upb.edu.co/handle/20.500.11912/3685
• https://repository.upb.edu.co/handle/20.500.11912/10054
• https://repository.upb.edu.co/handle/20.500.11912/2730
• https://repository.upb.edu.co/handle/20.500.11912/3872
• https://repository.upb.edu.co/handle/20.500.11912/9027
• https://repository.upb.edu.co/handle/20.500.11912/3186
• https://repository.upb.edu.co/handle/20.500.11912/2726
• https://repository.upb.edu.co/handle/20.500.11912/10507
• https://repository.upb.edu.co/handle/20.500.11912/8285
• https://repository.upb.edu.co/handle/20.500.11912/1740
• https://repository.upb.edu.co/handle/20.500.11912/10764
• https://repository.upb.edu.co/handle/20.500.11912/6266
• https://repository.upb.edu.co/handle/20.500.11912/7037
• https://repository.upb.edu.co/handle/20.500.11912/10767
• https://repository.upb.edu.co/handle/20.500.11912/6221
• https://repository.upb.edu.co/handle/20.500.11912/835
• https://repository.upb.edu.co/handle/20.500.11912/3767
• https://repository.upb.edu.co/handle/20.500.11912/481
• https://repository.upb.edu.co/handle/20.500.11912/8263
• https://repository.upb.edu.co/handle/20.500.11912/4293
• https://repository.upb.edu.co/handle/20.500.11912/771
• https://repository.upb.edu.co/handle/20.500.11912/9708
• https://repository.upb.edu.co/handle/20.500.11912/878
• https://repository.upb.edu.co/handle/20.500.11912/8799
• https://repository.upb.edu.co/handle/20.500.11912/3005
• https://repository.upb.edu.co/handle/20.500.11912/2284
• https://repository.upb.edu.co/handle/20.500.11912/979
• https://repository.upb.edu.co/handle/20.500.11912/7481
• https://repository.upb.edu.co/handle/20.500.11912/2520
• https://repository.upb.edu.co/handle/20.500.11912/6077
• https://repository.upb.edu.co/handle/20.500.11912/11083
• https://repository.upb.edu.co/handle/20.500.11912/5333
• https://repository.upb.edu.co/handle/20.500.11912/3471
• https://repository.upb.edu.co/handle/20.500.11912/11563
• https://repository.upb.edu.co/handle/20.500.11912/4961
• https://repository.upb.edu.co/handle/20.500.11912/797
• https://repository.upb.edu.co/handle/20.500.11912/10916
• https://repository.upb.edu.co/handle/20.500.11912/7476
• https://repository.upb.edu.co/handle/20.500.11912/6226
• https://repository.upb.edu.co/handle/20.500.11912/5931
• https://repository.upb.edu.co/handle/20.500.11912/1284
• https://repository.upb.edu.co/handle/20.500.11912/10282
• https://repository.upb.edu.co/handle/20.500.11912/4342
• https://repository.upb.edu.co/handle/20.500.11912/10811
• https://repository.upb.edu.co/handle/20.500.11912/2001
• https://repository.upb.edu.co/handle/20.500.11912/619
• https://repository.upb.edu.co/handle/20.500.11912/3225
• https://repository.upb.edu.co/handle/20.500.11912/2299
• https://repository.upb.edu.co/handle/20.500.11912/11713
• https://repository.upb.edu.co/handle/20.500.11912/1801
• https://repository.upb.edu.co/handle/20.500.11912/10700
• https://repository.upb.edu.co/handle/20.500.11912/8309
• https://repository.upb.edu.co/handle/20.500.11912/8917
• https://repository.upb.edu.co/handle/20.500.11912/7232
• https://repository.upb.edu.co/handle/20.500.11912/10443
• https://repository.upb.edu.co/handle/20.500.11912/8633
• https://repository.upb.edu.co/handle/20.500.11912/10583
• https://repository.upb.edu.co/handle/20.500.11912/7965
• https://repository.upb.edu.co/handle/20.500.11912/3446
• https://repository.upb.edu.co/handle/20.500.11912/251
• https://repository.upb.edu.co/handle/20.500.11912/4116
• https://repository.upb.edu.co/handle/20.500.11912/3713
• https://repository.upb.edu.co/handle/20.500.11912/11416
• https://repository.upb.edu.co/handle/20.500.11912/1260
• https://repository.upb.edu.co/handle/20.500.11912/5668
• https://repository.upb.edu.co/handle/20.500.11912/3337
• https://repository.upb.edu.co/handle/20.500.11912/4050
• https://repository.upb.edu.co/handle/20.500.11912/5450
• https://repository.upb.edu.co/handle/20.500.11912/10197
• https://repository.upb.edu.co/handle/20.500.11912/1942
• https://repository.upb.edu.co/handle/20.500.11912/2668
• https://repository.upb.edu.co/handle/20.500.11912/4974
• https://repository.upb.edu.co/handle/20.500.11912/9828
• https://repository.upb.edu.co/handle/20.500.11912/10287
• https://repository.upb.edu.co/handle/20.500.11912/10335
• https://repository.upb.edu.co/handle/20.500.11912/3877
• https://repository.upb.edu.co/handle/20.500.11912/3594
• https://repository.upb.edu.co/handle/20.500.11912/2838
• https://repository.upb.edu.co/handle/20.500.11912/5980
• https://repository.upb.edu.co/handle/20.500.11912/4051
• https://repository.upb.edu.co/handle/20.500.11912/8622
• https://repository.upb.edu.co/handle/20.500.11912/7058
• https://repository.upb.edu.co/handle/20.500.11912/11056
• https://repository.upb.edu.co/handle/20.500.11912/2513
• https://repository.upb.edu.co/handle/20.500.11912/373
• https://repository.upb.edu.co/handle/20.500.11912/9083
• https://repository.upb.edu.co/handle/20.500.11912/9305
• https://repository.upb.edu.co/handle/20.500.11912/11788
• https://repository.upb.edu.co/handle/20.500.11912/7599
• https://repository.upb.edu.co/handle/20.500.11912/1657
• https://repository.upb.edu.co/handle/20.500.11912/9971
• https://repository.upb.edu.co/handle/20.500.11912/11555
• https://repository.upb.edu.co/handle/20.500.11912/5706
• https://repository.upb.edu.co/handle/20.500.11912/9299
• https://repository.upb.edu.co/handle/20.500.11912/5546
• https://repository.upb.edu.co/handle/20.500.11912/3078
• https://repository.upb.edu.co/handle/20.500.11912/10459
• https://repository.upb.edu.co/handle/20.500.11912/10372
• https://repository.upb.edu.co/handle/20.500.11912/3978
• https://repository.upb.edu.co/handle/20.500.11912/4977
• https://repository.upb.edu.co/handle/20.500.11912/8583
• https://repository.upb.edu.co/handle/20.500.11912/9972
• https://repository.upb.edu.co/handle/20.500.11912/5303
• https://repository.upb.edu.co/handle/20.500.11912/1946
• https://repository.upb.edu.co/handle/20.500.11912/2432
• https://repository.upb.edu.co/handle/20.500.11912/10564
• https://repository.upb.edu.co/handle/20.500.11912/11682
• https://repository.upb.edu.co/handle/20.500.11912/6485
• https://repository.upb.edu.co/handle/20.500.11912/2466
• https://repository.upb.edu.co/handle/20.500.11912/5926
• https://repository.upb.edu.co/handle/20.500.11912/2321
• https://repository.upb.edu.co/handle/20.500.11912/7741
• https://repository.upb.edu.co/handle/20.500.11912/9472
• https://repository.upb.edu.co/handle/20.500.11912/9950
• https://repository.upb.edu.co/handle/20.500.11912/10792
• https://repository.upb.edu.co/handle/20.500.11912/3407
• https://repository.upb.edu.co/handle/20.500.11912/10364
• https://repository.upb.edu.co/handle/20.500.11912/3933
• https://repository.upb.edu.co/handle/20.500.11912/9149
• https://repository.upb.edu.co/handle/20.500.11912/3579
• https://repository.upb.edu.co/handle/20.500.11912/6544
• https://repository.upb.edu.co/handle/20.500.11912/2918
• https://repository.upb.edu.co/handle/20.500.11912/758
• https://repository.upb.edu.co/handle/20.500.11912/7231
• https://repository.upb.edu.co/handle/20.500.11912/3568
• https://repository.upb.edu.co/handle/20.500.11912/859
• https://repository.upb.edu.co/handle/20.500.11912/4910
• https://repository.upb.edu.co/handle/20.500.11912/3838
• https://repository.upb.edu.co/handle/20.500.11912/9200
• https://repository.upb.edu.co/handle/20.500.11912/5130
• https://repository.upb.edu.co/handle/20.500.11912/7214
• https://repository.upb.edu.co/handle/20.500.11912/2245
• https://repository.upb.edu.co/handle/20.500.11912/11645
• https://repository.upb.edu.co/handle/20.500.11912/4144
• https://repository.upb.edu.co/handle/20.500.11912/70
• https://repository.upb.edu.co/handle/20.500.11912/2411
• https://repository.upb.edu.co/handle/20.500.11912/526
• https://repository.upb.edu.co/handle/20.500.11912/4266
• https://repository.upb.edu.co/handle/20.500.11912/10774
• https://repository.upb.edu.co/handle/20.500.11912/8107
• https://repository.upb.edu.co/handle/20.500.11912/7358
• https://repository.upb.edu.co/handle/20.500.11912/1335
• https://repository.upb.edu.co/handle/20.500.11912/74
• https://repository.upb.edu.co/handle/20.500.11912/3149
• https://repository.upb.edu.co/handle/20.500.11912/211
• https://repository.upb.edu.co/handle/20.500.11912/5558
• https://repository.upb.edu.co/handle/20.500.11912/668
• https://repository.upb.edu.co/handle/20.500.11912/7359
• https://repository.upb.edu.co/handle/20.500.11912/5343
• https://repository.upb.edu.co/handle/20.500.11912/2891
• https://repository.upb.edu.co/handle/20.500.11912/6813
• https://repository.upb.edu.co/handle/20.500.11912/6083
• https://repository.upb.edu.co/handle/20.500.11912/2307
• https://repository.upb.edu.co/handle/20.500.11912/3793
• https://repository.upb.edu.co/handle/20.500.11912/7486