• https://repository.upb.edu.co/handle/20.500.11912/11616
• https://repository.upb.edu.co/handle/20.500.11912/1782
• https://repository.upb.edu.co/handle/20.500.11912/4598
• https://repository.upb.edu.co/handle/20.500.11912/10899
• https://repository.upb.edu.co/handle/20.500.11912/1594
• https://repository.upb.edu.co/handle/20.500.11912/6145
• https://repository.upb.edu.co/handle/20.500.11912/2958
• https://repository.upb.edu.co/handle/20.500.11912/10260
• https://repository.upb.edu.co/handle/20.500.11912/2055
• https://repository.upb.edu.co/handle/20.500.11912/10862
• https://repository.upb.edu.co/handle/20.500.11912/6987
• https://repository.upb.edu.co/handle/20.500.11912/10022
• https://repository.upb.edu.co/handle/20.500.11912/3990
• https://repository.upb.edu.co/handle/20.500.11912/580
• https://repository.upb.edu.co/handle/20.500.11912/5230
• https://repository.upb.edu.co/handle/20.500.11912/6320
• https://repository.upb.edu.co/handle/20.500.11912/12091
• https://repository.upb.edu.co/handle/20.500.11912/9093
• https://repository.upb.edu.co/handle/20.500.11912/1172
• https://repository.upb.edu.co/handle/20.500.11912/3504
• https://repository.upb.edu.co/handle/20.500.11912/1773
• https://repository.upb.edu.co/handle/20.500.11912/3429
• https://repository.upb.edu.co/handle/20.500.11912/5858
• https://repository.upb.edu.co/handle/20.500.11912/10201
• https://repository.upb.edu.co/handle/20.500.11912/587
• https://repository.upb.edu.co/handle/20.500.11912/9719
• https://repository.upb.edu.co/handle/20.500.11912/11333
• https://repository.upb.edu.co/handle/20.500.11912/7605
• https://repository.upb.edu.co/handle/20.500.11912/342
• https://repository.upb.edu.co/handle/20.500.11912/8856
• https://repository.upb.edu.co/handle/20.500.11912/6581
• https://repository.upb.edu.co/handle/20.500.11912/4769
• https://repository.upb.edu.co/handle/20.500.11912/10186
• https://repository.upb.edu.co/handle/20.500.11912/1106
• https://repository.upb.edu.co/handle/20.500.11912/2195
• https://repository.upb.edu.co/handle/20.500.11912/665
• https://repository.upb.edu.co/handle/20.500.11912/1932
• https://repository.upb.edu.co/handle/20.500.11912/5246
• https://repository.upb.edu.co/handle/20.500.11912/11448
• https://repository.upb.edu.co/handle/20.500.11912/7600
• https://repository.upb.edu.co/handle/20.500.11912/9278
• https://repository.upb.edu.co/handle/20.500.11912/172
• https://repository.upb.edu.co/handle/20.500.11912/7946
• https://repository.upb.edu.co/handle/20.500.11912/5892
• https://repository.upb.edu.co/handle/20.500.11912/7579
• https://repository.upb.edu.co/handle/20.500.11912/11222
• https://repository.upb.edu.co/handle/20.500.11912/3008
• https://repository.upb.edu.co/handle/20.500.11912/3385
• https://repository.upb.edu.co/handle/20.500.11912/2258
• https://repository.upb.edu.co/handle/20.500.11912/7876
• https://repository.upb.edu.co/handle/20.500.11912/7789
• https://repository.upb.edu.co/handle/20.500.11912/9322
• https://repository.upb.edu.co/handle/20.500.11912/8584
• https://repository.upb.edu.co/handle/20.500.11912/2831
• https://repository.upb.edu.co/handle/20.500.11912/2802
• https://repository.upb.edu.co/handle/20.500.11912/8757
• https://repository.upb.edu.co/handle/20.500.11912/11707
• https://repository.upb.edu.co/handle/20.500.11912/6178
• https://repository.upb.edu.co/handle/20.500.11912/4011
• https://repository.upb.edu.co/handle/20.500.11912/3241
• https://repository.upb.edu.co/handle/20.500.11912/7958
• https://repository.upb.edu.co/handle/20.500.11912/8265
• https://repository.upb.edu.co/handle/20.500.11912/9019
• https://repository.upb.edu.co/handle/20.500.11912/11930
• https://repository.upb.edu.co/handle/20.500.11912/5282
• https://repository.upb.edu.co/handle/20.500.11912/7267
• https://repository.upb.edu.co/handle/20.500.11912/11234
• https://repository.upb.edu.co/handle/20.500.11912/7409
• https://repository.upb.edu.co/handle/20.500.11912/9575
• https://repository.upb.edu.co/handle/20.500.11912/7790
• https://repository.upb.edu.co/handle/20.500.11912/824
• https://repository.upb.edu.co/handle/20.500.11912/11230
• https://repository.upb.edu.co/handle/20.500.11912/7920
• https://repository.upb.edu.co/handle/20.500.11912/7450
• https://repository.upb.edu.co/handle/20.500.11912/4787
• https://repository.upb.edu.co/handle/20.500.11912/8896
• https://repository.upb.edu.co/handle/20.500.11912/2693
• https://repository.upb.edu.co/handle/20.500.11912/789
• https://repository.upb.edu.co/handle/20.500.11912/5144
• https://repository.upb.edu.co/handle/20.500.11912/11945
• https://repository.upb.edu.co/handle/20.500.11912/2348
• https://repository.upb.edu.co/handle/20.500.11912/5428
• https://repository.upb.edu.co/handle/20.500.11912/1715
• https://repository.upb.edu.co/handle/20.500.11912/11137
• https://repository.upb.edu.co/handle/20.500.11912/10973
• https://repository.upb.edu.co/handle/20.500.11912/11363
• https://repository.upb.edu.co/handle/20.500.11912/1874
• https://repository.upb.edu.co/handle/20.500.11912/5221
• https://repository.upb.edu.co/handle/20.500.11912/4927
• https://repository.upb.edu.co/handle/20.500.11912/7647
• https://repository.upb.edu.co/handle/20.500.11912/3003
• https://repository.upb.edu.co/handle/20.500.11912/7574
• https://repository.upb.edu.co/handle/20.500.11912/3314
• https://repository.upb.edu.co/handle/20.500.11912/7042
• https://repository.upb.edu.co/handle/20.500.11912/11202
• https://repository.upb.edu.co/handle/20.500.11912/5331
• https://repository.upb.edu.co/handle/20.500.11912/7441
• https://repository.upb.edu.co/handle/20.500.11912/2522
• https://repository.upb.edu.co/handle/20.500.11912/5669
• https://repository.upb.edu.co/handle/20.500.11912/5062
• https://repository.upb.edu.co/handle/20.500.11912/9834
• https://repository.upb.edu.co/handle/20.500.11912/11446
• https://repository.upb.edu.co/handle/20.500.11912/3854
• https://repository.upb.edu.co/handle/20.500.11912/10329
• https://repository.upb.edu.co/handle/20.500.11912/2412
• https://repository.upb.edu.co/handle/20.500.11912/5093
• https://repository.upb.edu.co/handle/20.500.11912/625
• https://repository.upb.edu.co/handle/20.500.11912/3934
• https://repository.upb.edu.co/handle/20.500.11912/9752
• https://repository.upb.edu.co/handle/20.500.11912/7440
• https://repository.upb.edu.co/handle/20.500.11912/9890
• https://repository.upb.edu.co/handle/20.500.11912/4002
• https://repository.upb.edu.co/handle/20.500.11912/3123
• https://repository.upb.edu.co/handle/20.500.11912/8906
• https://repository.upb.edu.co/handle/20.500.11912/7805
• https://repository.upb.edu.co/handle/20.500.11912/9649
• https://repository.upb.edu.co/handle/20.500.11912/896
• https://repository.upb.edu.co/handle/20.500.11912/8258
• https://repository.upb.edu.co/handle/20.500.11912/7190
• https://repository.upb.edu.co/handle/20.500.11912/1027
• https://repository.upb.edu.co/handle/20.500.11912/2372
• https://repository.upb.edu.co/handle/20.500.11912/6081
• https://repository.upb.edu.co/handle/20.500.11912/107
• https://repository.upb.edu.co/handle/20.500.11912/6079
• https://repository.upb.edu.co/handle/20.500.11912/2170
• https://repository.upb.edu.co/handle/20.500.11912/11579
• https://repository.upb.edu.co/handle/20.500.11912/5793
• https://repository.upb.edu.co/handle/20.500.11912/670
• https://repository.upb.edu.co/handle/20.500.11912/11050
• https://repository.upb.edu.co/handle/20.500.11912/1481
• https://repository.upb.edu.co/handle/20.500.11912/10436
• https://repository.upb.edu.co/handle/20.500.11912/3496
• https://repository.upb.edu.co/handle/20.500.11912/9720
• https://repository.upb.edu.co/handle/20.500.11912/10210
• https://repository.upb.edu.co/handle/20.500.11912/12212
• https://repository.upb.edu.co/handle/20.500.11912/3621
• https://repository.upb.edu.co/handle/20.500.11912/5170
• https://repository.upb.edu.co/handle/20.500.11912/5380
• https://repository.upb.edu.co/handle/20.500.11912/8363
• https://repository.upb.edu.co/handle/20.500.11912/2557
• https://repository.upb.edu.co/handle/20.500.11912/9849
• https://repository.upb.edu.co/handle/20.500.11912/1819
• https://repository.upb.edu.co/handle/20.500.11912/4308
• https://repository.upb.edu.co/handle/20.500.11912/4107
• https://repository.upb.edu.co/handle/20.500.11912/3736
• https://repository.upb.edu.co/handle/20.500.11912/6250
• https://repository.upb.edu.co/handle/20.500.11912/146
• https://repository.upb.edu.co/handle/20.500.11912/9193
• https://repository.upb.edu.co/handle/20.500.11912/12093
• https://repository.upb.edu.co/handle/20.500.11912/10688
• https://repository.upb.edu.co/handle/20.500.11912/8236
• https://repository.upb.edu.co/handle/20.500.11912/6475
• https://repository.upb.edu.co/handle/20.500.11912/8439
• https://repository.upb.edu.co/handle/20.500.11912/5243
• https://repository.upb.edu.co/handle/20.500.11912/2998
• https://repository.upb.edu.co/handle/20.500.11912/5611
• https://repository.upb.edu.co/handle/20.500.11912/9587
• https://repository.upb.edu.co/handle/20.500.11912/4326
• https://repository.upb.edu.co/handle/20.500.11912/3153
• https://repository.upb.edu.co/handle/20.500.11912/2543
• https://repository.upb.edu.co/handle/20.500.11912/1169
• https://repository.upb.edu.co/handle/20.500.11912/4052
• https://repository.upb.edu.co/handle/20.500.11912/1384
• https://repository.upb.edu.co/handle/20.500.11912/11809
• https://repository.upb.edu.co/handle/20.500.11912/6745
• https://repository.upb.edu.co/handle/20.500.11912/10119
• https://repository.upb.edu.co/handle/20.500.11912/4905
• https://repository.upb.edu.co/handle/20.500.11912/8968
• https://repository.upb.edu.co/handle/20.500.11912/6355
• https://repository.upb.edu.co/handle/20.500.11912/6213
• https://repository.upb.edu.co/handle/20.500.11912/7582
• https://repository.upb.edu.co/handle/20.500.11912/5247
• https://repository.upb.edu.co/handle/20.500.11912/1892
• https://repository.upb.edu.co/handle/20.500.11912/7640
• https://repository.upb.edu.co/handle/20.500.11912/7630
• https://repository.upb.edu.co/handle/20.500.11912/6919
• https://repository.upb.edu.co/handle/20.500.11912/10835
• https://repository.upb.edu.co/handle/20.500.11912/1903
• https://repository.upb.edu.co/handle/20.500.11912/10303
• https://repository.upb.edu.co/handle/20.500.11912/11440
• https://repository.upb.edu.co/handle/20.500.11912/9451
• https://repository.upb.edu.co/handle/20.500.11912/5146
• https://repository.upb.edu.co/handle/20.500.11912/5105
• https://repository.upb.edu.co/handle/20.500.11912/617
• https://repository.upb.edu.co/handle/20.500.11912/5716
• https://repository.upb.edu.co/handle/20.500.11912/2859
• https://repository.upb.edu.co/handle/20.500.11912/4442
• https://repository.upb.edu.co/handle/20.500.11912/8629
• https://repository.upb.edu.co/handle/20.500.11912/6674
• https://repository.upb.edu.co/handle/20.500.11912/6788
• https://repository.upb.edu.co/handle/20.500.11912/10233
• https://repository.upb.edu.co/handle/20.500.11912/2425
• https://repository.upb.edu.co/handle/20.500.11912/1705
• https://repository.upb.edu.co/handle/20.500.11912/11641
• https://repository.upb.edu.co/handle/20.500.11912/4608
• https://repository.upb.edu.co/handle/20.500.11912/1156
• https://repository.upb.edu.co/handle/20.500.11912/4190
• https://repository.upb.edu.co/handle/20.500.11912/3554
• https://repository.upb.edu.co/handle/20.500.11912/8907
• https://repository.upb.edu.co/handle/20.500.11912/9109
• https://repository.upb.edu.co/handle/20.500.11912/660
• https://repository.upb.edu.co/handle/20.500.11912/5898
• https://repository.upb.edu.co/handle/20.500.11912/8177
• https://repository.upb.edu.co/handle/20.500.11912/5325
• https://repository.upb.edu.co/handle/20.500.11912/8868
• https://repository.upb.edu.co/handle/20.500.11912/9256
• https://repository.upb.edu.co/handle/20.500.11912/11187
• https://repository.upb.edu.co/handle/20.500.11912/9107
• https://repository.upb.edu.co/handle/20.500.11912/11146
• https://repository.upb.edu.co/handle/20.500.11912/8413
• https://repository.upb.edu.co/handle/20.500.11912/5918
• https://repository.upb.edu.co/handle/20.500.11912/7610
• https://repository.upb.edu.co/handle/20.500.11912/5070
• https://repository.upb.edu.co/handle/20.500.11912/11382
• https://repository.upb.edu.co/handle/20.500.11912/5954
• https://repository.upb.edu.co/handle/20.500.11912/3288
• https://repository.upb.edu.co/handle/20.500.11912/6921
• https://repository.upb.edu.co/handle/20.500.11912/10346
• https://repository.upb.edu.co/handle/20.500.11912/2669
• https://repository.upb.edu.co/handle/20.500.11912/1683
• https://repository.upb.edu.co/handle/20.500.11912/9515
• https://repository.upb.edu.co/handle/20.500.11912/6335
• https://repository.upb.edu.co/handle/20.500.11912/6870
• https://repository.upb.edu.co/handle/20.500.11912/11671
• https://repository.upb.edu.co/handle/20.500.11912/1646
• https://repository.upb.edu.co/handle/20.500.11912/11653
• https://repository.upb.edu.co/handle/20.500.11912/2573
• https://repository.upb.edu.co/handle/20.500.11912/9518
• https://repository.upb.edu.co/handle/20.500.11912/6343
• https://repository.upb.edu.co/handle/20.500.11912/8842
• https://repository.upb.edu.co/handle/20.500.11912/2152
• https://repository.upb.edu.co/handle/20.500.11912/12142
• https://repository.upb.edu.co/handle/20.500.11912/1777
• https://repository.upb.edu.co/handle/20.500.11912/3261
• https://repository.upb.edu.co/handle/20.500.11912/2518
• https://repository.upb.edu.co/handle/20.500.11912/9171
• https://repository.upb.edu.co/handle/20.500.11912/4363
• https://repository.upb.edu.co/handle/20.500.11912/11828
• https://repository.upb.edu.co/handle/20.500.11912/3474
• https://repository.upb.edu.co/handle/20.500.11912/11367
• https://repository.upb.edu.co/handle/20.500.11912/9100
• https://repository.upb.edu.co/handle/20.500.11912/5655
• https://repository.upb.edu.co/handle/20.500.11912/6020
• https://repository.upb.edu.co/handle/20.500.11912/1750
• https://repository.upb.edu.co/handle/20.500.11912/11279
• https://repository.upb.edu.co/handle/20.500.11912/9791
• https://repository.upb.edu.co/handle/20.500.11912/6264
• https://repository.upb.edu.co/handle/20.500.11912/715
• https://repository.upb.edu.co/handle/20.500.11912/1560
• https://repository.upb.edu.co/handle/20.500.11912/11053
• https://repository.upb.edu.co/handle/20.500.11912/9845
• https://repository.upb.edu.co/handle/20.500.11912/9885
• https://repository.upb.edu.co/handle/20.500.11912/5053
• https://repository.upb.edu.co/handle/20.500.11912/1592
• https://repository.upb.edu.co/handle/20.500.11912/11503
• https://repository.upb.edu.co/handle/20.500.11912/3634
• https://repository.upb.edu.co/handle/20.500.11912/10410
• https://repository.upb.edu.co/handle/20.500.11912/7251
• https://repository.upb.edu.co/handle/20.500.11912/2163
• https://repository.upb.edu.co/handle/20.500.11912/622
• https://repository.upb.edu.co/handle/20.500.11912/194
• https://repository.upb.edu.co/handle/20.500.11912/10214
• https://repository.upb.edu.co/handle/20.500.11912/2994
• https://repository.upb.edu.co/handle/20.500.11912/1038
• https://repository.upb.edu.co/handle/20.500.11912/8687
• https://repository.upb.edu.co/handle/20.500.11912/3675
• https://repository.upb.edu.co/handle/20.500.11912/3950
• https://repository.upb.edu.co/handle/20.500.11912/9393
• https://repository.upb.edu.co/handle/20.500.11912/6022
• https://repository.upb.edu.co/handle/20.500.11912/5824
• https://repository.upb.edu.co/handle/20.500.11912/12220
• https://repository.upb.edu.co/handle/20.500.11912/11972
• https://repository.upb.edu.co/handle/20.500.11912/5615
• https://repository.upb.edu.co/handle/20.500.11912/5188
• https://repository.upb.edu.co/handle/20.500.11912/11441
• https://repository.upb.edu.co/handle/20.500.11912/9887
• https://repository.upb.edu.co/handle/20.500.11912/7888
• https://repository.upb.edu.co/handle/20.500.11912/4410
• https://repository.upb.edu.co/handle/20.500.11912/2070
• https://repository.upb.edu.co/handle/20.500.11912/3560
• https://repository.upb.edu.co/handle/20.500.11912/4840
• https://repository.upb.edu.co/handle/20.500.11912/3026
• https://repository.upb.edu.co/handle/20.500.11912/11457
• https://repository.upb.edu.co/handle/20.500.11912/118
• https://repository.upb.edu.co/handle/20.500.11912/3505
• https://repository.upb.edu.co/handle/20.500.11912/10484
• https://repository.upb.edu.co/handle/20.500.11912/12120
• https://repository.upb.edu.co/handle/20.500.11912/10772
• https://repository.upb.edu.co/handle/20.500.11912/5855
• https://repository.upb.edu.co/handle/20.500.11912/10769
• https://repository.upb.edu.co/handle/20.500.11912/11877
• https://repository.upb.edu.co/handle/20.500.11912/3747
• https://repository.upb.edu.co/handle/20.500.11912/3974
• https://repository.upb.edu.co/handle/20.500.11912/2832
• https://repository.upb.edu.co/handle/20.500.11912/4941
• https://repository.upb.edu.co/handle/20.500.11912/7401
• https://repository.upb.edu.co/handle/20.500.11912/11979
• https://repository.upb.edu.co/handle/20.500.11912/3426
• https://repository.upb.edu.co/handle/20.500.11912/9755
• https://repository.upb.edu.co/handle/20.500.11912/673
• https://repository.upb.edu.co/handle/20.500.11912/5834
• https://repository.upb.edu.co/handle/20.500.11912/7491
• https://repository.upb.edu.co/handle/20.500.11912/9001
• https://repository.upb.edu.co/handle/20.500.11912/1336
• https://repository.upb.edu.co/handle/20.500.11912/11664
• https://repository.upb.edu.co/handle/20.500.11912/4374
• https://repository.upb.edu.co/handle/20.500.11912/7818
• https://repository.upb.edu.co/handle/20.500.11912/596
• https://repository.upb.edu.co/handle/20.500.11912/9150
• https://repository.upb.edu.co/handle/20.500.11912/2252
• https://repository.upb.edu.co/handle/20.500.11912/1464
• https://repository.upb.edu.co/handle/20.500.11912/3323
• https://repository.upb.edu.co/handle/20.500.11912/9351
• https://repository.upb.edu.co/handle/20.500.11912/2734
• https://repository.upb.edu.co/handle/20.500.11912/12196
• https://repository.upb.edu.co/handle/20.500.11912/10918
• https://repository.upb.edu.co/handle/20.500.11912/1338
• https://repository.upb.edu.co/handle/20.500.11912/2253
• https://repository.upb.edu.co/handle/20.500.11912/8471
• https://repository.upb.edu.co/handle/20.500.11912/11545
• https://repository.upb.edu.co/handle/20.500.11912/3544
• https://repository.upb.edu.co/handle/20.500.11912/3925
• https://repository.upb.edu.co/handle/20.500.11912/4248
• https://repository.upb.edu.co/handle/20.500.11912/8753
• https://repository.upb.edu.co/handle/20.500.11912/9806
• https://repository.upb.edu.co/handle/20.500.11912/9741
• https://repository.upb.edu.co/handle/20.500.11912/5378
• https://repository.upb.edu.co/handle/20.500.11912/7171
• https://repository.upb.edu.co/handle/20.500.11912/5699
• https://repository.upb.edu.co/handle/20.500.11912/128
• https://repository.upb.edu.co/handle/20.500.11912/8109
• https://repository.upb.edu.co/handle/20.500.11912/6280
• https://repository.upb.edu.co/handle/20.500.11912/1129
• https://repository.upb.edu.co/handle/20.500.11912/3755
• https://repository.upb.edu.co/handle/20.500.11912/6754
• https://repository.upb.edu.co/handle/20.500.11912/5693
• https://repository.upb.edu.co/handle/20.500.11912/6601
• https://repository.upb.edu.co/handle/20.500.11912/10196
• https://repository.upb.edu.co/handle/20.500.11912/1747
• https://repository.upb.edu.co/handle/20.500.11912/1391
• https://repository.upb.edu.co/handle/20.500.11912/1605
• https://repository.upb.edu.co/handle/20.500.11912/5909
• https://repository.upb.edu.co/handle/20.500.11912/2032
• https://repository.upb.edu.co/handle/20.500.11912/8510
• https://repository.upb.edu.co/handle/20.500.11912/10719
• https://repository.upb.edu.co/handle/20.500.11912/3057
• https://repository.upb.edu.co/handle/20.500.11912/9727
• https://repository.upb.edu.co/handle/20.500.11912/5442
• https://repository.upb.edu.co/handle/20.500.11912/9569
• https://repository.upb.edu.co/handle/20.500.11912/10737
• https://repository.upb.edu.co/handle/20.500.11912/10330
• https://repository.upb.edu.co/handle/20.500.11912/2667
• https://repository.upb.edu.co/handle/20.500.11912/1247
• https://repository.upb.edu.co/handle/20.500.11912/871
• https://repository.upb.edu.co/handle/20.500.11912/10294
• https://repository.upb.edu.co/handle/20.500.11912/2064
• https://repository.upb.edu.co/handle/20.500.11912/1612
• https://repository.upb.edu.co/handle/20.500.11912/7331
• https://repository.upb.edu.co/handle/20.500.11912/2123
• https://repository.upb.edu.co/handle/20.500.11912/562
• https://repository.upb.edu.co/handle/20.500.11912/3956
• https://repository.upb.edu.co/handle/20.500.11912/8540
• https://repository.upb.edu.co/handle/20.500.11912/8526
• https://repository.upb.edu.co/handle/20.500.11912/4195
• https://repository.upb.edu.co/handle/20.500.11912/1914
• https://repository.upb.edu.co/handle/20.500.11912/4718
• https://repository.upb.edu.co/handle/20.500.11912/681
• https://repository.upb.edu.co/handle/20.500.11912/8430
• https://repository.upb.edu.co/handle/20.500.11912/4074
• https://repository.upb.edu.co/handle/20.500.11912/3695
• https://repository.upb.edu.co/handle/20.500.11912/8488
• https://repository.upb.edu.co/handle/20.500.11912/1298
• https://repository.upb.edu.co/handle/20.500.11912/1382
• https://repository.upb.edu.co/handle/20.500.11912/6688
• https://repository.upb.edu.co/handle/20.500.11912/5781
• https://repository.upb.edu.co/handle/20.500.11912/6191
• https://repository.upb.edu.co/handle/20.500.11912/7679
• https://repository.upb.edu.co/handle/20.500.11912/5195
• https://repository.upb.edu.co/handle/20.500.11912/9049
• https://repository.upb.edu.co/handle/20.500.11912/10226
• https://repository.upb.edu.co/handle/20.500.11912/6046
• https://repository.upb.edu.co/handle/20.500.11912/5782
• https://repository.upb.edu.co/handle/20.500.11912/9044