URL List

https://dspace.unl.edu.ec//handle/123456789/18352
https://dspace.unl.edu.ec//handle/123456789/18367
https://dspace.unl.edu.ec//handle/123456789/18376
https://dspace.unl.edu.ec//handle/123456789/18360
https://dspace.unl.edu.ec//handle/123456789/18356
https://dspace.unl.edu.ec//handle/123456789/18358
https://dspace.unl.edu.ec//handle/123456789/18362
https://dspace.unl.edu.ec//handle/123456789/18300
https://dspace.unl.edu.ec//handle/123456789/18372
https://dspace.unl.edu.ec//handle/123456789/18364
https://dspace.unl.edu.ec//handle/123456789/18378
https://dspace.unl.edu.ec//handle/123456789/18375
https://dspace.unl.edu.ec//handle/123456789/18385
https://dspace.unl.edu.ec//handle/123456789/18366
https://dspace.unl.edu.ec//handle/123456789/18369
https://dspace.unl.edu.ec//handle/123456789/18377
https://dspace.unl.edu.ec//handle/123456789/18371
https://dspace.unl.edu.ec//handle/123456789/18368
https://dspace.unl.edu.ec//handle/123456789/18379
https://dspace.unl.edu.ec//handle/123456789/18374
https://dspace.unl.edu.ec//handle/123456789/18380
https://dspace.unl.edu.ec//handle/123456789/18389
https://dspace.unl.edu.ec//handle/123456789/18381
https://dspace.unl.edu.ec//handle/123456789/18315
https://dspace.unl.edu.ec//handle/123456789/12267
https://dspace.unl.edu.ec//handle/123456789/18382
https://dspace.unl.edu.ec//handle/123456789/18383
https://dspace.unl.edu.ec//handle/123456789/15859
https://dspace.unl.edu.ec//handle/123456789/19670
https://dspace.unl.edu.ec//handle/123456789/21749
https://dspace.unl.edu.ec//handle/123456789/19689
https://dspace.unl.edu.ec//handle/123456789/15851
https://dspace.unl.edu.ec//handle/123456789/19663
https://dspace.unl.edu.ec//handle/123456789/19680
https://dspace.unl.edu.ec//handle/123456789/18387
https://dspace.unl.edu.ec//handle/123456789/19715
https://dspace.unl.edu.ec//handle/123456789/19685
https://dspace.unl.edu.ec//handle/123456789/19664
https://dspace.unl.edu.ec//handle/123456789/18388
https://dspace.unl.edu.ec//handle/123456789/19671
https://dspace.unl.edu.ec//handle/123456789/19676
https://dspace.unl.edu.ec//handle/123456789/19705
https://dspace.unl.edu.ec//handle/123456789/19694
https://dspace.unl.edu.ec//handle/123456789/19666
https://dspace.unl.edu.ec//handle/123456789/18390
https://dspace.unl.edu.ec//handle/123456789/19713
https://dspace.unl.edu.ec//handle/123456789/19681
https://dspace.unl.edu.ec//handle/123456789/19710
https://dspace.unl.edu.ec//handle/123456789/19690
https://dspace.unl.edu.ec//handle/123456789/19672
https://dspace.unl.edu.ec//handle/123456789/8983
https://dspace.unl.edu.ec//handle/123456789/19686
https://dspace.unl.edu.ec//handle/123456789/19677
https://dspace.unl.edu.ec//handle/123456789/18396
https://dspace.unl.edu.ec//handle/123456789/19667
https://dspace.unl.edu.ec//handle/123456789/19682
https://dspace.unl.edu.ec//handle/123456789/19702
https://dspace.unl.edu.ec//handle/123456789/19734
https://dspace.unl.edu.ec//handle/123456789/19698
https://dspace.unl.edu.ec//handle/123456789/19673
https://dspace.unl.edu.ec//handle/123456789/18398
https://dspace.unl.edu.ec//handle/123456789/19668
https://dspace.unl.edu.ec//handle/123456789/19678
https://dspace.unl.edu.ec//handle/123456789/21750
https://dspace.unl.edu.ec//handle/123456789/19695
https://dspace.unl.edu.ec//handle/123456789/19687
https://dspace.unl.edu.ec//handle/123456789/19683
https://dspace.unl.edu.ec//handle/123456789/19674
https://dspace.unl.edu.ec//handle/123456789/19691
https://dspace.unl.edu.ec//handle/123456789/19669
https://dspace.unl.edu.ec//handle/123456789/19721
https://dspace.unl.edu.ec//handle/123456789/19679
https://dspace.unl.edu.ec//handle/123456789/19708
https://dspace.unl.edu.ec//handle/123456789/19675
https://dspace.unl.edu.ec//handle/123456789/19723
https://dspace.unl.edu.ec//handle/123456789/19684
https://dspace.unl.edu.ec//handle/123456789/19703
https://dspace.unl.edu.ec//handle/123456789/19688
https://dspace.unl.edu.ec//handle/123456789/19700
https://dspace.unl.edu.ec//handle/123456789/19692
https://dspace.unl.edu.ec//handle/123456789/19718
https://dspace.unl.edu.ec//handle/123456789/19711
https://dspace.unl.edu.ec//handle/123456789/19706
https://dspace.unl.edu.ec//handle/123456789/19696
https://dspace.unl.edu.ec//handle/123456789/19714
https://dspace.unl.edu.ec//handle/123456789/19693
https://dspace.unl.edu.ec//handle/123456789/19716
https://dspace.unl.edu.ec//handle/123456789/19725
https://dspace.unl.edu.ec//handle/123456789/19704
https://dspace.unl.edu.ec//handle/123456789/19697
https://dspace.unl.edu.ec//handle/123456789/19701
https://dspace.unl.edu.ec//handle/123456789/19707
https://dspace.unl.edu.ec//handle/123456789/19727
https://dspace.unl.edu.ec//handle/123456789/19709
https://dspace.unl.edu.ec//handle/123456789/19712
https://dspace.unl.edu.ec//handle/123456789/19732
https://dspace.unl.edu.ec//handle/123456789/19722
https://dspace.unl.edu.ec//handle/123456789/19719
https://dspace.unl.edu.ec//handle/123456789/19729
https://dspace.unl.edu.ec//handle/123456789/19717
https://dspace.unl.edu.ec//handle/123456789/19726
https://dspace.unl.edu.ec//handle/123456789/19724
https://dspace.unl.edu.ec//handle/123456789/19733
https://dspace.unl.edu.ec//handle/123456789/19736
https://dspace.unl.edu.ec//handle/123456789/19731
https://dspace.unl.edu.ec//handle/123456789/19735
https://dspace.unl.edu.ec//handle/123456789/19728
https://dspace.unl.edu.ec//handle/123456789/19737
https://dspace.unl.edu.ec//handle/123456789/19738
https://dspace.unl.edu.ec//handle/123456789/20655
https://dspace.unl.edu.ec//handle/123456789/20657
https://dspace.unl.edu.ec//handle/123456789/20693
https://dspace.unl.edu.ec//handle/123456789/18391
https://dspace.unl.edu.ec//handle/123456789/20669
https://dspace.unl.edu.ec//handle/123456789/20663
https://dspace.unl.edu.ec//handle/123456789/20658
https://dspace.unl.edu.ec//handle/123456789/20652
https://dspace.unl.edu.ec//handle/123456789/20733
https://dspace.unl.edu.ec//handle/123456789/20682
https://dspace.unl.edu.ec//handle/123456789/20678
https://dspace.unl.edu.ec//handle/123456789/18392
https://dspace.unl.edu.ec//handle/123456789/20664
https://dspace.unl.edu.ec//handle/123456789/20727
https://dspace.unl.edu.ec//handle/123456789/20686
https://dspace.unl.edu.ec//handle/123456789/20674
https://dspace.unl.edu.ec//handle/123456789/20653
https://dspace.unl.edu.ec//handle/123456789/20722
https://dspace.unl.edu.ec//handle/123456789/20697
https://dspace.unl.edu.ec//handle/123456789/20665
https://dspace.unl.edu.ec//handle/123456789/20703
https://dspace.unl.edu.ec//handle/123456789/20659
https://dspace.unl.edu.ec//handle/123456789/20670
https://dspace.unl.edu.ec//handle/123456789/22572
https://dspace.unl.edu.ec//handle/123456789/20690
https://dspace.unl.edu.ec//handle/123456789/20654
https://dspace.unl.edu.ec//handle/123456789/21751
https://dspace.unl.edu.ec//handle/123456789/18394
https://dspace.unl.edu.ec//handle/123456789/20700
https://dspace.unl.edu.ec//handle/123456789/20679
https://dspace.unl.edu.ec//handle/123456789/20660
https://dspace.unl.edu.ec//handle/123456789/20666
https://dspace.unl.edu.ec//handle/123456789/20694
https://dspace.unl.edu.ec//handle/123456789/20683
https://dspace.unl.edu.ec//handle/123456789/20713
https://dspace.unl.edu.ec//handle/123456789/20661
https://dspace.unl.edu.ec//handle/123456789/20708
https://dspace.unl.edu.ec//handle/123456789/20687
https://dspace.unl.edu.ec//handle/123456789/20675
https://dspace.unl.edu.ec//handle/123456789/20656
https://dspace.unl.edu.ec//handle/123456789/20724
https://dspace.unl.edu.ec//handle/123456789/20667
https://dspace.unl.edu.ec//handle/123456789/20718
https://dspace.unl.edu.ec//handle/123456789/20662
https://dspace.unl.edu.ec//handle/123456789/20680
https://dspace.unl.edu.ec//handle/123456789/20672
https://dspace.unl.edu.ec//handle/123456789/20691
https://dspace.unl.edu.ec//handle/123456789/20684
https://dspace.unl.edu.ec//handle/123456789/20676
https://dspace.unl.edu.ec//handle/123456789/20668
https://dspace.unl.edu.ec//handle/123456789/20698
https://dspace.unl.edu.ec//handle/123456789/20688
https://dspace.unl.edu.ec//handle/123456789/20673
https://dspace.unl.edu.ec//handle/123456789/20716
https://dspace.unl.edu.ec//handle/123456789/20701
https://dspace.unl.edu.ec//handle/123456789/20677
https://dspace.unl.edu.ec//handle/123456789/20685
https://dspace.unl.edu.ec//handle/123456789/20692
https://dspace.unl.edu.ec//handle/123456789/20695
https://dspace.unl.edu.ec//handle/123456789/20706
https://dspace.unl.edu.ec//handle/123456789/20711
https://dspace.unl.edu.ec//handle/123456789/20689
https://dspace.unl.edu.ec//handle/123456789/20704
https://dspace.unl.edu.ec//handle/123456789/20699
https://dspace.unl.edu.ec//handle/123456789/20709
https://dspace.unl.edu.ec//handle/123456789/20702
https://dspace.unl.edu.ec//handle/123456789/20714
https://dspace.unl.edu.ec//handle/123456789/20737
https://dspace.unl.edu.ec//handle/123456789/20707
https://dspace.unl.edu.ec//handle/123456789/20719
https://dspace.unl.edu.ec//handle/123456789/20726
https://dspace.unl.edu.ec//handle/123456789/20712
https://dspace.unl.edu.ec//handle/123456789/20717
https://dspace.unl.edu.ec//handle/123456789/20732
https://dspace.unl.edu.ec//handle/123456789/20710
https://dspace.unl.edu.ec//handle/123456789/20721
https://dspace.unl.edu.ec//handle/123456789/20715
https://dspace.unl.edu.ec//handle/123456789/20731
https://dspace.unl.edu.ec//handle/123456789/20725
https://dspace.unl.edu.ec//handle/123456789/20730
https://dspace.unl.edu.ec//handle/123456789/20720
https://dspace.unl.edu.ec//handle/123456789/20728
https://dspace.unl.edu.ec//handle/123456789/20723
https://dspace.unl.edu.ec//handle/123456789/20729
https://dspace.unl.edu.ec//handle/123456789/20738
https://dspace.unl.edu.ec//handle/123456789/20681
https://dspace.unl.edu.ec//handle/123456789/20696
https://dspace.unl.edu.ec//handle/123456789/20736
https://dspace.unl.edu.ec//handle/123456789/20735
https://dspace.unl.edu.ec//handle/123456789/20734
https://dspace.unl.edu.ec//handle/123456789/20739
https://dspace.unl.edu.ec//handle/123456789/15103
https://dspace.unl.edu.ec//handle/123456789/18422
https://dspace.unl.edu.ec//handle/123456789/18413
https://dspace.unl.edu.ec//handle/123456789/8852
https://dspace.unl.edu.ec//handle/123456789/18430
https://dspace.unl.edu.ec//handle/123456789/18403
https://dspace.unl.edu.ec//handle/123456789/18395
https://dspace.unl.edu.ec//handle/123456789/18434
https://dspace.unl.edu.ec//handle/123456789/18418
https://dspace.unl.edu.ec//handle/123456789/18470
https://dspace.unl.edu.ec//handle/123456789/18441
https://dspace.unl.edu.ec//handle/123456789/18427
https://dspace.unl.edu.ec//handle/123456789/18397
https://dspace.unl.edu.ec//handle/123456789/18404
https://dspace.unl.edu.ec//handle/123456789/18453
https://dspace.unl.edu.ec//handle/123456789/18423
https://dspace.unl.edu.ec//handle/123456789/18409
https://dspace.unl.edu.ec//handle/123456789/18438
https://dspace.unl.edu.ec//handle/123456789/18419
https://dspace.unl.edu.ec//handle/123456789/18405
https://dspace.unl.edu.ec//handle/123456789/18458
https://dspace.unl.edu.ec//handle/123456789/18431
https://dspace.unl.edu.ec//handle/123456789/18436
https://dspace.unl.edu.ec//handle/123456789/18415
https://dspace.unl.edu.ec//handle/123456789/19739
https://dspace.unl.edu.ec//handle/123456789/18410
https://dspace.unl.edu.ec//handle/123456789/18400
https://dspace.unl.edu.ec//handle/123456789/18481
https://dspace.unl.edu.ec//handle/123456789/18435
https://dspace.unl.edu.ec//handle/123456789/18428
https://dspace.unl.edu.ec//handle/123456789/18406
https://dspace.unl.edu.ec//handle/123456789/18448
https://dspace.unl.edu.ec//handle/123456789/18424
https://dspace.unl.edu.ec//handle/123456789/18420
https://dspace.unl.edu.ec//handle/123456789/18401
https://dspace.unl.edu.ec//handle/123456789/18445
https://dspace.unl.edu.ec//handle/123456789/18411
https://dspace.unl.edu.ec//handle/123456789/18456
https://dspace.unl.edu.ec//handle/123456789/18407
https://dspace.unl.edu.ec//handle/123456789/18402
https://dspace.unl.edu.ec//handle/123456789/18399
https://dspace.unl.edu.ec//handle/123456789/18416
https://dspace.unl.edu.ec//handle/123456789/18432
https://dspace.unl.edu.ec//handle/123456789/18442
https://dspace.unl.edu.ec//handle/123456789/19744
https://dspace.unl.edu.ec//handle/123456789/18412
https://dspace.unl.edu.ec//handle/123456789/18429
https://dspace.unl.edu.ec//handle/123456789/18421
https://dspace.unl.edu.ec//handle/123456789/18451
https://dspace.unl.edu.ec//handle/123456789/19740
https://dspace.unl.edu.ec//handle/123456789/18425
https://dspace.unl.edu.ec//handle/123456789/18439
https://dspace.unl.edu.ec//handle/123456789/19742
https://dspace.unl.edu.ec//handle/123456789/18414
https://dspace.unl.edu.ec//handle/123456789/18417
https://dspace.unl.edu.ec//handle/123456789/18463
https://dspace.unl.edu.ec//handle/123456789/18475
https://dspace.unl.edu.ec//handle/123456789/18433
https://dspace.unl.edu.ec//handle/123456789/19745
https://dspace.unl.edu.ec//handle/123456789/18426
https://dspace.unl.edu.ec//handle/123456789/18461
https://dspace.unl.edu.ec//handle/123456789/18454
https://dspace.unl.edu.ec//handle/123456789/18446
https://dspace.unl.edu.ec//handle/123456789/19746
https://dspace.unl.edu.ec//handle/123456789/18443
https://dspace.unl.edu.ec//handle/123456789/18449
https://dspace.unl.edu.ec//handle/123456789/19741
https://dspace.unl.edu.ec//handle/123456789/18440
https://dspace.unl.edu.ec//handle/123456789/18472
https://dspace.unl.edu.ec//handle/123456789/18465
https://dspace.unl.edu.ec//handle/123456789/18437
https://dspace.unl.edu.ec//handle/123456789/18480
https://dspace.unl.edu.ec//handle/123456789/18452
https://dspace.unl.edu.ec//handle/123456789/18459
https://dspace.unl.edu.ec//handle/123456789/18447
https://dspace.unl.edu.ec//handle/123456789/18444
https://dspace.unl.edu.ec//handle/123456789/18457
https://dspace.unl.edu.ec//handle/123456789/18467
https://dspace.unl.edu.ec//handle/123456789/19743
https://dspace.unl.edu.ec//handle/123456789/18455
https://dspace.unl.edu.ec//handle/123456789/18450
https://dspace.unl.edu.ec//handle/123456789/18482
https://dspace.unl.edu.ec//handle/123456789/18464
https://dspace.unl.edu.ec//handle/123456789/18462
https://dspace.unl.edu.ec//handle/123456789/18469
https://dspace.unl.edu.ec//handle/123456789/18474
https://dspace.unl.edu.ec//handle/123456789/18460
https://dspace.unl.edu.ec//handle/123456789/18471
https://dspace.unl.edu.ec//handle/123456789/19748
https://dspace.unl.edu.ec//handle/123456789/18466
https://dspace.unl.edu.ec//handle/123456789/18483
https://dspace.unl.edu.ec//handle/123456789/18477
https://dspace.unl.edu.ec//handle/123456789/18468
https://dspace.unl.edu.ec//handle/123456789/19749
https://dspace.unl.edu.ec//handle/123456789/18473
https://dspace.unl.edu.ec//handle/123456789/18478
https://dspace.unl.edu.ec//handle/123456789/18479
https://dspace.unl.edu.ec//handle/123456789/18485
https://dspace.unl.edu.ec//handle/123456789/19752
https://dspace.unl.edu.ec//handle/123456789/18476
https://dspace.unl.edu.ec//handle/123456789/19751
https://dspace.unl.edu.ec//handle/123456789/18484
https://dspace.unl.edu.ec//handle/123456789/18486
https://dspace.unl.edu.ec//handle/123456789/19757
https://dspace.unl.edu.ec//handle/123456789/18487
https://dspace.unl.edu.ec//handle/123456789/21752
https://dspace.unl.edu.ec//handle/123456789/21358
https://dspace.unl.edu.ec//handle/123456789/21339
https://dspace.unl.edu.ec//handle/123456789/19760
https://dspace.unl.edu.ec//handle/123456789/19822
https://dspace.unl.edu.ec//handle/123456789/22573
https://dspace.unl.edu.ec//handle/123456789/18488
https://dspace.unl.edu.ec//handle/123456789/21319
https://dspace.unl.edu.ec//handle/123456789/21303
https://dspace.unl.edu.ec//handle/123456789/20740
https://dspace.unl.edu.ec//handle/123456789/19747
https://dspace.unl.edu.ec//handle/123456789/21151
https://dspace.unl.edu.ec//handle/123456789/22574
https://dspace.unl.edu.ec//handle/123456789/19796
https://dspace.unl.edu.ec//handle/123456789/19761
https://dspace.unl.edu.ec//handle/123456789/18491
https://dspace.unl.edu.ec//handle/123456789/18541
https://dspace.unl.edu.ec//handle/123456789/21327
https://dspace.unl.edu.ec//handle/123456789/21344
https://dspace.unl.edu.ec//handle/123456789/21312
https://dspace.unl.edu.ec//handle/123456789/19750
https://dspace.unl.edu.ec//handle/123456789/19776
https://dspace.unl.edu.ec//handle/123456789/19797
https://dspace.unl.edu.ec//handle/123456789/18543
https://dspace.unl.edu.ec//handle/123456789/19763
https://dspace.unl.edu.ec//handle/123456789/21306
https://dspace.unl.edu.ec//handle/123456789/21351
https://dspace.unl.edu.ec//handle/123456789/21333
https://dspace.unl.edu.ec//handle/123456789/19753
https://dspace.unl.edu.ec//handle/123456789/19823
https://dspace.unl.edu.ec//handle/123456789/20747
https://dspace.unl.edu.ec//handle/123456789/19777
https://dspace.unl.edu.ec//handle/123456789/19754
https://dspace.unl.edu.ec//handle/123456789/21153
https://dspace.unl.edu.ec//handle/123456789/19766
https://dspace.unl.edu.ec//handle/123456789/21307
https://dspace.unl.edu.ec//handle/123456789/19758
https://dspace.unl.edu.ec//handle/123456789/19824
https://dspace.unl.edu.ec//handle/123456789/21348
https://dspace.unl.edu.ec//handle/123456789/21336
https://dspace.unl.edu.ec//handle/123456789/19799
https://dspace.unl.edu.ec//handle/123456789/20749
https://dspace.unl.edu.ec//handle/123456789/19800
https://dspace.unl.edu.ec//handle/123456789/19790
https://dspace.unl.edu.ec//handle/123456789/21321
https://dspace.unl.edu.ec//handle/123456789/21316
https://dspace.unl.edu.ec//handle/123456789/21363
https://dspace.unl.edu.ec//handle/123456789/21155
https://dspace.unl.edu.ec//handle/123456789/19759
https://dspace.unl.edu.ec//handle/123456789/19793
https://dspace.unl.edu.ec//handle/123456789/21328
https://dspace.unl.edu.ec//handle/123456789/19771
https://dspace.unl.edu.ec//handle/123456789/19829
https://dspace.unl.edu.ec//handle/123456789/21342
https://dspace.unl.edu.ec//handle/123456789/21379
https://dspace.unl.edu.ec//handle/123456789/19815
https://dspace.unl.edu.ec//handle/123456789/21308
https://dspace.unl.edu.ec//handle/123456789/20750
https://dspace.unl.edu.ec//handle/123456789/21334
https://dspace.unl.edu.ec//handle/123456789/21301
https://dspace.unl.edu.ec//handle/123456789/21355
https://dspace.unl.edu.ec//handle/123456789/19834
https://dspace.unl.edu.ec//handle/123456789/21302
https://dspace.unl.edu.ec//handle/123456789/21340
https://dspace.unl.edu.ec//handle/123456789/21317
https://dspace.unl.edu.ec//handle/123456789/21365
https://dspace.unl.edu.ec//handle/123456789/21309
https://dspace.unl.edu.ec//handle/123456789/21329
https://dspace.unl.edu.ec//handle/123456789/21325
https://dspace.unl.edu.ec//handle/123456789/21338
https://dspace.unl.edu.ec//handle/123456789/21349
https://dspace.unl.edu.ec//handle/123456789/21375
https://dspace.unl.edu.ec//handle/123456789/21335
https://dspace.unl.edu.ec//handle/123456789/21332
https://dspace.unl.edu.ec//handle/123456789/21343
https://dspace.unl.edu.ec//handle/123456789/21373
https://dspace.unl.edu.ec//handle/123456789/21361
https://dspace.unl.edu.ec//handle/123456789/21364
https://dspace.unl.edu.ec//handle/123456789/21356
https://dspace.unl.edu.ec//handle/123456789/21341
https://dspace.unl.edu.ec//handle/123456789/21352
https://dspace.unl.edu.ec//handle/123456789/21345
https://dspace.unl.edu.ec//handle/123456789/21360
https://dspace.unl.edu.ec//handle/123456789/21346
https://dspace.unl.edu.ec//handle/123456789/21350
https://dspace.unl.edu.ec//handle/123456789/21347
https://dspace.unl.edu.ec//handle/123456789/21359
https://dspace.unl.edu.ec//handle/123456789/21354
https://dspace.unl.edu.ec//handle/123456789/21366
https://dspace.unl.edu.ec//handle/123456789/21376
https://dspace.unl.edu.ec//handle/123456789/21362
https://dspace.unl.edu.ec//handle/123456789/21369
https://dspace.unl.edu.ec//handle/123456789/21367
https://dspace.unl.edu.ec//handle/123456789/21368
https://dspace.unl.edu.ec//handle/123456789/21370
https://dspace.unl.edu.ec//handle/123456789/15158
https://dspace.unl.edu.ec//handle/123456789/21371
https://dspace.unl.edu.ec//handle/123456789/21377
https://dspace.unl.edu.ec//handle/123456789/21372
https://dspace.unl.edu.ec//handle/123456789/21374
https://dspace.unl.edu.ec//handle/123456789/19768
https://dspace.unl.edu.ec//handle/123456789/19782
https://dspace.unl.edu.ec//handle/123456789/19818
https://dspace.unl.edu.ec//handle/123456789/19787
https://dspace.unl.edu.ec//handle/123456789/18489
https://dspace.unl.edu.ec//handle/123456789/19803
https://dspace.unl.edu.ec//handle/123456789/19755
https://dspace.unl.edu.ec//handle/123456789/19830
https://dspace.unl.edu.ec//handle/123456789/19827