• https://repository.upb.edu.co/handle/20.500.11912/8120
• https://repository.upb.edu.co/handle/20.500.11912/7348
• https://repository.upb.edu.co/handle/20.500.11912/7326
• https://repository.upb.edu.co/handle/20.500.11912/8088
• https://repository.upb.edu.co/handle/20.500.11912/7665
• https://repository.upb.edu.co/handle/20.500.11912/8089
• https://repository.upb.edu.co/handle/20.500.11912/7290
• https://repository.upb.edu.co/handle/20.500.11912/7570
• https://repository.upb.edu.co/handle/20.500.11912/7212
• https://repository.upb.edu.co/handle/20.500.11912/7208
• https://repository.upb.edu.co/handle/20.500.11912/8141
• https://repository.upb.edu.co/handle/20.500.11912/7469
• https://repository.upb.edu.co/handle/20.500.11912/7324
• https://repository.upb.edu.co/handle/20.500.11912/8142
• https://repository.upb.edu.co/handle/20.500.11912/7606
• https://repository.upb.edu.co/handle/20.500.11912/4114
• https://repository.upb.edu.co/handle/20.500.11912/7477
• https://repository.upb.edu.co/handle/20.500.11912/8140
• https://repository.upb.edu.co/handle/20.500.11912/7483
• https://repository.upb.edu.co/handle/20.500.11912/7330
• https://repository.upb.edu.co/handle/20.500.11912/7515
• https://repository.upb.edu.co/handle/20.500.11912/7518
• https://repository.upb.edu.co/handle/20.500.11912/7520
• https://repository.upb.edu.co/handle/20.500.11912/7605
• https://repository.upb.edu.co/handle/20.500.11912/7470
• https://repository.upb.edu.co/handle/20.500.11912/7812
• https://repository.upb.edu.co/handle/20.500.11912/7662
• https://repository.upb.edu.co/handle/20.500.11912/7670
• https://repository.upb.edu.co/handle/20.500.11912/7580
• https://repository.upb.edu.co/handle/20.500.11912/7669
• https://repository.upb.edu.co/handle/20.500.11912/7571
• https://repository.upb.edu.co/handle/20.500.11912/7673
• https://repository.upb.edu.co/handle/20.500.11912/7672
• https://repository.upb.edu.co/handle/20.500.11912/7668
• https://repository.upb.edu.co/handle/20.500.11912/7796
• https://repository.upb.edu.co/handle/20.500.11912/7801
• https://repository.upb.edu.co/handle/20.500.11912/7815
• https://repository.upb.edu.co/handle/20.500.11912/7766
• https://repository.upb.edu.co/handle/20.500.11912/8771
• https://repository.upb.edu.co/handle/20.500.11912/7226
• https://repository.upb.edu.co/handle/20.500.11912/8052
• https://repository.upb.edu.co/handle/20.500.11912/7471
• https://repository.upb.edu.co/handle/20.500.11912/7254
• https://repository.upb.edu.co/handle/20.500.11912/7057
• https://repository.upb.edu.co/handle/20.500.11912/7983
• https://repository.upb.edu.co/handle/20.500.11912/8631
• https://repository.upb.edu.co/handle/20.500.11912/8058
• https://repository.upb.edu.co/handle/20.500.11912/6860
• https://repository.upb.edu.co/handle/20.500.11912/7258
• https://repository.upb.edu.co/handle/20.500.11912/6465
• https://repository.upb.edu.co/handle/20.500.11912/7435
• https://repository.upb.edu.co/handle/20.500.11912/7323
• https://repository.upb.edu.co/handle/20.500.11912/6906
• https://repository.upb.edu.co/handle/20.500.11912/6777
• https://repository.upb.edu.co/handle/20.500.11912/6775
• https://repository.upb.edu.co/handle/20.500.11912/7415
• https://repository.upb.edu.co/handle/20.500.11912/7982
• https://repository.upb.edu.co/handle/20.500.11912/7213
• https://repository.upb.edu.co/handle/20.500.11912/8147
• https://repository.upb.edu.co/handle/20.500.11912/8115
• https://repository.upb.edu.co/handle/20.500.11912/7476
• https://repository.upb.edu.co/handle/20.500.11912/6477
• https://repository.upb.edu.co/handle/20.500.11912/6861
• https://repository.upb.edu.co/handle/20.500.11912/6851
• https://repository.upb.edu.co/handle/20.500.11912/6770
• https://repository.upb.edu.co/handle/20.500.11912/8055
• https://repository.upb.edu.co/handle/20.500.11912/8562
• https://repository.upb.edu.co/handle/20.500.11912/7058
• https://repository.upb.edu.co/handle/20.500.11912/7174
• https://repository.upb.edu.co/handle/20.500.11912/7432
• https://repository.upb.edu.co/handle/20.500.11912/7256
• https://repository.upb.edu.co/handle/20.500.11912/7059
• https://repository.upb.edu.co/handle/20.500.11912/8007
• https://repository.upb.edu.co/handle/20.500.11912/7119
• https://repository.upb.edu.co/handle/20.500.11912/8268
• https://repository.upb.edu.co/handle/20.500.11912/6478
• https://repository.upb.edu.co/handle/20.500.11912/8108
• https://repository.upb.edu.co/handle/20.500.11912/6907
• https://repository.upb.edu.co/handle/20.500.11912/8048
• https://repository.upb.edu.co/handle/20.500.11912/8057
• https://repository.upb.edu.co/handle/20.500.11912/7227
• https://repository.upb.edu.co/handle/20.500.11912/6852
• https://repository.upb.edu.co/handle/20.500.11912/8143
• https://repository.upb.edu.co/handle/20.500.11912/7175
• https://repository.upb.edu.co/handle/20.500.11912/8087
• https://repository.upb.edu.co/handle/20.500.11912/8200
• https://repository.upb.edu.co/handle/20.500.11912/7737
• https://repository.upb.edu.co/handle/20.500.11912/7219
• https://repository.upb.edu.co/handle/20.500.11912/6774
• https://repository.upb.edu.co/handle/20.500.11912/7329
• https://repository.upb.edu.co/handle/20.500.11912/8201
• https://repository.upb.edu.co/handle/20.500.11912/6857
• https://repository.upb.edu.co/handle/20.500.11912/8193
• https://repository.upb.edu.co/handle/20.500.11912/7260
• https://repository.upb.edu.co/handle/20.500.11912/8202
• https://repository.upb.edu.co/handle/20.500.11912/6915
• https://repository.upb.edu.co/handle/20.500.11912/6865
• https://repository.upb.edu.co/handle/20.500.11912/7420
• https://repository.upb.edu.co/handle/20.500.11912/8241
• https://repository.upb.edu.co/handle/20.500.11912/6916
• https://repository.upb.edu.co/handle/20.500.11912/6776
• https://repository.upb.edu.co/handle/20.500.11912/6914
• https://repository.upb.edu.co/handle/20.500.11912/6910
• https://repository.upb.edu.co/handle/20.500.11912/8243
• https://repository.upb.edu.co/handle/20.500.11912/7736
• https://repository.upb.edu.co/handle/20.500.11912/7416
• https://repository.upb.edu.co/handle/20.500.11912/6866
• https://repository.upb.edu.co/handle/20.500.11912/7257
• https://repository.upb.edu.co/handle/20.500.11912/7225
• https://repository.upb.edu.co/handle/20.500.11912/7251
• https://repository.upb.edu.co/handle/20.500.11912/8222
• https://repository.upb.edu.co/handle/20.500.11912/8245
• https://repository.upb.edu.co/handle/20.500.11912/6867
• https://repository.upb.edu.co/handle/20.500.11912/7116
• https://repository.upb.edu.co/handle/20.500.11912/7615
• https://repository.upb.edu.co/handle/20.500.11912/6911
• https://repository.upb.edu.co/handle/20.500.11912/8249
• https://repository.upb.edu.co/handle/20.500.11912/7168
• https://repository.upb.edu.co/handle/20.500.11912/7176
• https://repository.upb.edu.co/handle/20.500.11912/8250
• https://repository.upb.edu.co/handle/20.500.11912/7117
• https://repository.upb.edu.co/handle/20.500.11912/7808
• https://repository.upb.edu.co/handle/20.500.11912/7769
• https://repository.upb.edu.co/handle/20.500.11912/7522
• https://repository.upb.edu.co/handle/20.500.11912/7436
• https://repository.upb.edu.co/handle/20.500.11912/7430
• https://repository.upb.edu.co/handle/20.500.11912/7349
• https://repository.upb.edu.co/handle/20.500.11912/7292
• https://repository.upb.edu.co/handle/20.500.11912/8269
• https://repository.upb.edu.co/handle/20.500.11912/7429
• https://repository.upb.edu.co/handle/20.500.11912/7617
• https://repository.upb.edu.co/handle/20.500.11912/7433
• https://repository.upb.edu.co/handle/20.500.11912/7472
• https://repository.upb.edu.co/handle/20.500.11912/7753
• https://repository.upb.edu.co/handle/20.500.11912/7421
• https://repository.upb.edu.co/handle/20.500.11912/7568
• https://repository.upb.edu.co/handle/20.500.11912/7611
• https://repository.upb.edu.co/handle/20.500.11912/7417
• https://repository.upb.edu.co/handle/20.500.11912/7608
• https://repository.upb.edu.co/handle/20.500.11912/7626
• https://repository.upb.edu.co/handle/20.500.11912/7706
• https://repository.upb.edu.co/handle/20.500.11912/7569
• https://repository.upb.edu.co/handle/20.500.11912/7618
• https://repository.upb.edu.co/handle/20.500.11912/7802
• https://repository.upb.edu.co/handle/20.500.11912/7751
• https://repository.upb.edu.co/handle/20.500.11912/7780
• https://repository.upb.edu.co/handle/20.500.11912/7745
• https://repository.upb.edu.co/handle/20.500.11912/7628
• https://repository.upb.edu.co/handle/20.500.11912/7807
• https://repository.upb.edu.co/handle/20.500.11912/7803
• https://repository.upb.edu.co/handle/20.500.11912/7746
• https://repository.upb.edu.co/handle/20.500.11912/7749
• https://repository.upb.edu.co/handle/20.500.11912/7782
• https://repository.upb.edu.co/handle/20.500.11912/7061
• https://repository.upb.edu.co/handle/20.500.11912/7123
• https://repository.upb.edu.co/handle/20.500.11912/6795
• https://repository.upb.edu.co/handle/20.500.11912/8011
• https://repository.upb.edu.co/handle/20.500.11912/6783
• https://repository.upb.edu.co/handle/20.500.11912/8051
• https://repository.upb.edu.co/handle/20.500.11912/6469
• https://repository.upb.edu.co/handle/20.500.11912/7266
• https://repository.upb.edu.co/handle/20.500.11912/7379
• https://repository.upb.edu.co/handle/20.500.11912/7313
• https://repository.upb.edu.co/handle/20.500.11912/7386
• https://repository.upb.edu.co/handle/20.500.11912/8111
• https://repository.upb.edu.co/handle/20.500.11912/6927
• https://repository.upb.edu.co/handle/20.500.11912/6778
• https://repository.upb.edu.co/handle/20.500.11912/7631
• https://repository.upb.edu.co/handle/20.500.11912/7267
• https://repository.upb.edu.co/handle/20.500.11912/6788
• https://repository.upb.edu.co/handle/20.500.11912/7067
• https://repository.upb.edu.co/handle/20.500.11912/6470
• https://repository.upb.edu.co/handle/20.500.11912/7296
• https://repository.upb.edu.co/handle/20.500.11912/8563
• https://repository.upb.edu.co/handle/20.500.11912/6928
• https://repository.upb.edu.co/handle/20.500.11912/8054
• https://repository.upb.edu.co/handle/20.500.11912/6799
• https://repository.upb.edu.co/handle/20.500.11912/7253
• https://repository.upb.edu.co/handle/20.500.11912/7720
• https://repository.upb.edu.co/handle/20.500.11912/7627
• https://repository.upb.edu.co/handle/20.500.11912/8012
• https://repository.upb.edu.co/handle/20.500.11912/7170
• https://repository.upb.edu.co/handle/20.500.11912/6472
• https://repository.upb.edu.co/handle/20.500.11912/6780
• https://repository.upb.edu.co/handle/20.500.11912/8146
• https://repository.upb.edu.co/handle/20.500.11912/8056
• https://repository.upb.edu.co/handle/20.500.11912/7572
• https://repository.upb.edu.co/handle/20.500.11912/8013
• https://repository.upb.edu.co/handle/20.500.11912/7424
• https://repository.upb.edu.co/handle/20.500.11912/8198
• https://repository.upb.edu.co/handle/20.500.11912/7740
• https://repository.upb.edu.co/handle/20.500.11912/7526
• https://repository.upb.edu.co/handle/20.500.11912/8144
• https://repository.upb.edu.co/handle/20.500.11912/7489
• https://repository.upb.edu.co/handle/20.500.11912/6948
• https://repository.upb.edu.co/handle/20.500.11912/6789
• https://repository.upb.edu.co/handle/20.500.11912/6868
• https://repository.upb.edu.co/handle/20.500.11912/7985
• https://repository.upb.edu.co/handle/20.500.11912/7328
• https://repository.upb.edu.co/handle/20.500.11912/8091
• https://repository.upb.edu.co/handle/20.500.11912/7532
• https://repository.upb.edu.co/handle/20.500.11912/7269
• https://repository.upb.edu.co/handle/20.500.11912/7390
• https://repository.upb.edu.co/handle/20.500.11912/7255
• https://repository.upb.edu.co/handle/20.500.11912/6781
• https://repository.upb.edu.co/handle/20.500.11912/7384
• https://repository.upb.edu.co/handle/20.500.11912/7309
• https://repository.upb.edu.co/handle/20.500.11912/7211
• https://repository.upb.edu.co/handle/20.500.11912/8122
• https://repository.upb.edu.co/handle/20.500.11912/7613
• https://repository.upb.edu.co/handle/20.500.11912/7610
• https://repository.upb.edu.co/handle/20.500.11912/7122
• https://repository.upb.edu.co/handle/20.500.11912/7121
• https://repository.upb.edu.co/handle/20.500.11912/6791
• https://repository.upb.edu.co/handle/20.500.11912/6920
• https://repository.upb.edu.co/handle/20.500.11912/6782
• https://repository.upb.edu.co/handle/20.500.11912/8244
• https://repository.upb.edu.co/handle/20.500.11912/8223
• https://repository.upb.edu.co/handle/20.500.11912/7774
• https://repository.upb.edu.co/handle/20.500.11912/7490
• https://repository.upb.edu.co/handle/20.500.11912/6961
• https://repository.upb.edu.co/handle/20.500.11912/7739
• https://repository.upb.edu.co/handle/20.500.11912/7632
• https://repository.upb.edu.co/handle/20.500.11912/8227
• https://repository.upb.edu.co/handle/20.500.11912/8230
• https://repository.upb.edu.co/handle/20.500.11912/7480
• https://repository.upb.edu.co/handle/20.500.11912/7252
• https://repository.upb.edu.co/handle/20.500.11912/7731
• https://repository.upb.edu.co/handle/20.500.11912/7487
• https://repository.upb.edu.co/handle/20.500.11912/7270
• https://repository.upb.edu.co/handle/20.500.11912/8270
• https://repository.upb.edu.co/handle/20.500.11912/8272
• https://repository.upb.edu.co/handle/20.500.11912/7367
• https://repository.upb.edu.co/handle/20.500.11912/7310
• https://repository.upb.edu.co/handle/20.500.11912/8247
• https://repository.upb.edu.co/handle/20.500.11912/7385
• https://repository.upb.edu.co/handle/20.500.11912/8276
• https://repository.upb.edu.co/handle/20.500.11912/7418
• https://repository.upb.edu.co/handle/20.500.11912/7671
• https://repository.upb.edu.co/handle/20.500.11912/7630
• https://repository.upb.edu.co/handle/20.500.11912/7619
• https://repository.upb.edu.co/handle/20.500.11912/7527
• https://repository.upb.edu.co/handle/20.500.11912/8286
• https://repository.upb.edu.co/handle/20.500.11912/7534
• https://repository.upb.edu.co/handle/20.500.11912/8278
• https://repository.upb.edu.co/handle/20.500.11912/7582
• https://repository.upb.edu.co/handle/20.500.11912/7525
• https://repository.upb.edu.co/handle/20.500.11912/7423
• https://repository.upb.edu.co/handle/20.500.11912/8284
• https://repository.upb.edu.co/handle/20.500.11912/7485
• https://repository.upb.edu.co/handle/20.500.11912/7728
• https://repository.upb.edu.co/handle/20.500.11912/8299
• https://repository.upb.edu.co/handle/20.500.11912/7716
• https://repository.upb.edu.co/handle/20.500.11912/7666
• https://repository.upb.edu.co/handle/20.500.11912/7531
• https://repository.upb.edu.co/handle/20.500.11912/7663
• https://repository.upb.edu.co/handle/20.500.11912/7661
• https://repository.upb.edu.co/handle/20.500.11912/7755
• https://repository.upb.edu.co/handle/20.500.11912/7629
• https://repository.upb.edu.co/handle/20.500.11912/7722
• https://repository.upb.edu.co/handle/20.500.11912/7776
• https://repository.upb.edu.co/handle/20.500.11912/7707
• https://repository.upb.edu.co/handle/20.500.11912/7710
• https://repository.upb.edu.co/handle/20.500.11912/7756
• https://repository.upb.edu.co/handle/20.500.11912/7773
• https://repository.upb.edu.co/handle/20.500.11912/7750
• https://repository.upb.edu.co/handle/20.500.11912/7781
• https://repository.upb.edu.co/handle/20.500.11912/6936
• https://repository.upb.edu.co/handle/20.500.11912/8564
• https://repository.upb.edu.co/handle/20.500.11912/6568
• https://repository.upb.edu.co/handle/20.500.11912/6482
• https://repository.upb.edu.co/handle/20.500.11912/6521
• https://repository.upb.edu.co/handle/20.500.11912/6881
• https://repository.upb.edu.co/handle/20.500.11912/6504
• https://repository.upb.edu.co/handle/20.500.11912/6473
• https://repository.upb.edu.co/handle/20.500.11912/6779
• https://repository.upb.edu.co/handle/20.500.11912/6532
• https://repository.upb.edu.co/handle/20.500.11912/6872
• https://repository.upb.edu.co/handle/20.500.11912/6500
• https://repository.upb.edu.co/handle/20.500.11912/6786
• https://repository.upb.edu.co/handle/20.500.11912/6508
• https://repository.upb.edu.co/handle/20.500.11912/6479
• https://repository.upb.edu.co/handle/20.500.11912/6491
• https://repository.upb.edu.co/handle/20.500.11912/6518
• https://repository.upb.edu.co/handle/20.500.11912/6880
• https://repository.upb.edu.co/handle/20.500.11912/6784
• https://repository.upb.edu.co/handle/20.500.11912/6487
• https://repository.upb.edu.co/handle/20.500.11912/8772
• https://repository.upb.edu.co/handle/20.500.11912/6533
• https://repository.upb.edu.co/handle/20.500.11912/6512
• https://repository.upb.edu.co/handle/20.500.11912/6505
• https://repository.upb.edu.co/handle/20.500.11912/6488
• https://repository.upb.edu.co/handle/20.500.11912/6492
• https://repository.upb.edu.co/handle/20.500.11912/6496
• https://repository.upb.edu.co/handle/20.500.11912/6515
• https://repository.upb.edu.co/handle/20.500.11912/6483
• https://repository.upb.edu.co/handle/20.500.11912/6921
• https://repository.upb.edu.co/handle/20.500.11912/6493
• https://repository.upb.edu.co/handle/20.500.11912/6871
• https://repository.upb.edu.co/handle/20.500.11912/6539
• https://repository.upb.edu.co/handle/20.500.11912/6484
• https://repository.upb.edu.co/handle/20.500.11912/6480
• https://repository.upb.edu.co/handle/20.500.11912/6528
• https://repository.upb.edu.co/handle/20.500.11912/6923
• https://repository.upb.edu.co/handle/20.500.11912/6922
• https://repository.upb.edu.co/handle/20.500.11912/6525
• https://repository.upb.edu.co/handle/20.500.11912/6987
• https://repository.upb.edu.co/handle/20.500.11912/6924
• https://repository.upb.edu.co/handle/20.500.11912/6522
• https://repository.upb.edu.co/handle/20.500.11912/6509
• https://repository.upb.edu.co/handle/20.500.11912/6497
• https://repository.upb.edu.co/handle/20.500.11912/6489
• https://repository.upb.edu.co/handle/20.500.11912/6546
• https://repository.upb.edu.co/handle/20.500.11912/6506
• https://repository.upb.edu.co/handle/20.500.11912/6498
• https://repository.upb.edu.co/handle/20.500.11912/6934
• https://repository.upb.edu.co/handle/20.500.11912/6551
• https://repository.upb.edu.co/handle/20.500.11912/6932
• https://repository.upb.edu.co/handle/20.500.11912/6501
• https://repository.upb.edu.co/handle/20.500.11912/6519
• https://repository.upb.edu.co/handle/20.500.11912/6513
• https://repository.upb.edu.co/handle/20.500.11912/6481
• https://repository.upb.edu.co/handle/20.500.11912/6485
• https://repository.upb.edu.co/handle/20.500.11912/6554
• https://repository.upb.edu.co/handle/20.500.11912/6547
• https://repository.upb.edu.co/handle/20.500.11912/6516
• https://repository.upb.edu.co/handle/20.500.11912/6494
• https://repository.upb.edu.co/handle/20.500.11912/6486
• https://repository.upb.edu.co/handle/20.500.11912/7064
• https://repository.upb.edu.co/handle/20.500.11912/6510
• https://repository.upb.edu.co/handle/20.500.11912/6502
• https://repository.upb.edu.co/handle/20.500.11912/6536
• https://repository.upb.edu.co/handle/20.500.11912/7065
• https://repository.upb.edu.co/handle/20.500.11912/6507
• https://repository.upb.edu.co/handle/20.500.11912/6495
• https://repository.upb.edu.co/handle/20.500.11912/6490
• https://repository.upb.edu.co/handle/20.500.11912/7066
• https://repository.upb.edu.co/handle/20.500.11912/6499
• https://repository.upb.edu.co/handle/20.500.11912/6503
• https://repository.upb.edu.co/handle/20.500.11912/6538
• https://repository.upb.edu.co/handle/20.500.11912/7070
• https://repository.upb.edu.co/handle/20.500.11912/6529
• https://repository.upb.edu.co/handle/20.500.11912/6526
• https://repository.upb.edu.co/handle/20.500.11912/7071
• https://repository.upb.edu.co/handle/20.500.11912/6520
• https://repository.upb.edu.co/handle/20.500.11912/6523
• https://repository.upb.edu.co/handle/20.500.11912/7125
• https://repository.upb.edu.co/handle/20.500.11912/6552
• https://repository.upb.edu.co/handle/20.500.11912/6517
• https://repository.upb.edu.co/handle/20.500.11912/6514
• https://repository.upb.edu.co/handle/20.500.11912/7178
• https://repository.upb.edu.co/handle/20.500.11912/6534
• https://repository.upb.edu.co/handle/20.500.11912/6511
• https://repository.upb.edu.co/handle/20.500.11912/6550
• https://repository.upb.edu.co/handle/20.500.11912/6563
• https://repository.upb.edu.co/handle/20.500.11912/7180
• https://repository.upb.edu.co/handle/20.500.11912/7210
• https://repository.upb.edu.co/handle/20.500.11912/6555
• https://repository.upb.edu.co/handle/20.500.11912/6543
• https://repository.upb.edu.co/handle/20.500.11912/6548
• https://repository.upb.edu.co/handle/20.500.11912/6524
• https://repository.upb.edu.co/handle/20.500.11912/7215
• https://repository.upb.edu.co/handle/20.500.11912/6553
• https://repository.upb.edu.co/handle/20.500.11912/6544
• https://repository.upb.edu.co/handle/20.500.11912/6527
• https://repository.upb.edu.co/handle/20.500.11912/7216
• https://repository.upb.edu.co/handle/20.500.11912/6540
• https://repository.upb.edu.co/handle/20.500.11912/6566
• https://repository.upb.edu.co/handle/20.500.11912/6535
• https://repository.upb.edu.co/handle/20.500.11912/6537
• https://repository.upb.edu.co/handle/20.500.11912/6564
• https://repository.upb.edu.co/handle/20.500.11912/6542
• https://repository.upb.edu.co/handle/20.500.11912/6559
• https://repository.upb.edu.co/handle/20.500.11912/6541
• https://repository.upb.edu.co/handle/20.500.11912/6557
• https://repository.upb.edu.co/handle/20.500.11912/6545
• https://repository.upb.edu.co/handle/20.500.11912/6561
• https://repository.upb.edu.co/handle/20.500.11912/6558
• https://repository.upb.edu.co/handle/20.500.11912/6549
• https://repository.upb.edu.co/handle/20.500.11912/6570
• https://repository.upb.edu.co/handle/20.500.11912/6556
• https://repository.upb.edu.co/handle/20.500.11912/6560
• https://repository.upb.edu.co/handle/20.500.11912/6565