URL List

https://dspace.unl.edu.ec//handle/123456789/454
https://dspace.unl.edu.ec//handle/123456789/383
https://dspace.unl.edu.ec//handle/123456789/356
https://dspace.unl.edu.ec//handle/123456789/360
https://dspace.unl.edu.ec//handle/123456789/341
https://dspace.unl.edu.ec//handle/123456789/364
https://dspace.unl.edu.ec//handle/123456789/554
https://dspace.unl.edu.ec//handle/123456789/439
https://dspace.unl.edu.ec//handle/123456789/430
https://dspace.unl.edu.ec//handle/123456789/461
https://dspace.unl.edu.ec//handle/123456789/551
https://dspace.unl.edu.ec//handle/123456789/440
https://dspace.unl.edu.ec//handle/123456789/431
https://dspace.unl.edu.ec//handle/123456789/555
https://dspace.unl.edu.ec//handle/123456789/455
https://dspace.unl.edu.ec//handle/123456789/447
https://dspace.unl.edu.ec//handle/123456789/432
https://dspace.unl.edu.ec//handle/123456789/448
https://dspace.unl.edu.ec//handle/123456789/556
https://dspace.unl.edu.ec//handle/123456789/441
https://dspace.unl.edu.ec//handle/123456789/473
https://dspace.unl.edu.ec//handle/123456789/462
https://dspace.unl.edu.ec//handle/123456789/442
https://dspace.unl.edu.ec//handle/123456789/456
https://dspace.unl.edu.ec//handle/123456789/449
https://dspace.unl.edu.ec//handle/123456789/328
https://dspace.unl.edu.ec//handle/123456789/443
https://dspace.unl.edu.ec//handle/123456789/409
https://dspace.unl.edu.ec//handle/123456789/410
https://dspace.unl.edu.ec//handle/123456789/468
https://dspace.unl.edu.ec//handle/123456789/450
https://dspace.unl.edu.ec//handle/123456789/457
https://dspace.unl.edu.ec//handle/123456789/451
https://dspace.unl.edu.ec//handle/123456789/463
https://dspace.unl.edu.ec//handle/123456789/458
https://dspace.unl.edu.ec//handle/123456789/464
https://dspace.unl.edu.ec//handle/123456789/478
https://dspace.unl.edu.ec//handle/123456789/470
https://dspace.unl.edu.ec//handle/123456789/465
https://dspace.unl.edu.ec//handle/123456789/497
https://dspace.unl.edu.ec//handle/123456789/482
https://dspace.unl.edu.ec//handle/123456789/475
https://dspace.unl.edu.ec//handle/123456789/224
https://dspace.unl.edu.ec//handle/123456789/471
https://dspace.unl.edu.ec//handle/123456789/485
https://dspace.unl.edu.ec//handle/123456789/479
https://dspace.unl.edu.ec//handle/123456789/476
https://dspace.unl.edu.ec//handle/123456789/490
https://dspace.unl.edu.ec//handle/123456789/483
https://dspace.unl.edu.ec//handle/123456789/480
https://dspace.unl.edu.ec//handle/123456789/488
https://dspace.unl.edu.ec//handle/123456789/486
https://dspace.unl.edu.ec//handle/123456789/484
https://dspace.unl.edu.ec//handle/123456789/492
https://dspace.unl.edu.ec//handle/123456789/487
https://dspace.unl.edu.ec//handle/123456789/489
https://dspace.unl.edu.ec//handle/123456789/491
https://dspace.unl.edu.ec//handle/123456789/496
https://dspace.unl.edu.ec//handle/123456789/494
https://dspace.unl.edu.ec//handle/123456789/493
https://dspace.unl.edu.ec//handle/123456789/495
https://dspace.unl.edu.ec//handle/123456789/498
https://dspace.unl.edu.ec//handle/123456789/499
https://dspace.unl.edu.ec//handle/123456789/509
https://dspace.unl.edu.ec//handle/123456789/567
https://dspace.unl.edu.ec//handle/123456789/500
https://dspace.unl.edu.ec//handle/123456789/615
https://dspace.unl.edu.ec//handle/123456789/724
https://dspace.unl.edu.ec//handle/123456789/501
https://dspace.unl.edu.ec//handle/123456789/537
https://dspace.unl.edu.ec//handle/123456789/594
https://dspace.unl.edu.ec//handle/123456789/723
https://dspace.unl.edu.ec//handle/123456789/568
https://dspace.unl.edu.ec//handle/123456789/947
https://dspace.unl.edu.ec//handle/123456789/504
https://dspace.unl.edu.ec//handle/123456789/511
https://dspace.unl.edu.ec//handle/123456789/538
https://dspace.unl.edu.ec//handle/123456789/606
https://dspace.unl.edu.ec//handle/123456789/505
https://dspace.unl.edu.ec//handle/123456789/513
https://dspace.unl.edu.ec//handle/123456789/3123
https://dspace.unl.edu.ec//handle/123456789/569
https://dspace.unl.edu.ec//handle/123456789/539
https://dspace.unl.edu.ec//handle/123456789/518
https://dspace.unl.edu.ec//handle/123456789/595
https://dspace.unl.edu.ec//handle/123456789/581
https://dspace.unl.edu.ec//handle/123456789/540
https://dspace.unl.edu.ec//handle/123456789/725
https://dspace.unl.edu.ec//handle/123456789/630
https://dspace.unl.edu.ec//handle/123456789/2611
https://dspace.unl.edu.ec//handle/123456789/542
https://dspace.unl.edu.ec//handle/123456789/616
https://dspace.unl.edu.ec//handle/123456789/582
https://dspace.unl.edu.ec//handle/123456789/597
https://dspace.unl.edu.ec//handle/123456789/726
https://dspace.unl.edu.ec//handle/123456789/543
https://dspace.unl.edu.ec//handle/123456789/607
https://dspace.unl.edu.ec//handle/123456789/583
https://dspace.unl.edu.ec//handle/123456789/544
https://dspace.unl.edu.ec//handle/123456789/727
https://dspace.unl.edu.ec//handle/123456789/598
https://dspace.unl.edu.ec//handle/123456789/584
https://dspace.unl.edu.ec//handle/123456789/545
https://dspace.unl.edu.ec//handle/123456789/624
https://dspace.unl.edu.ec//handle/123456789/546
https://dspace.unl.edu.ec//handle/123456789/608
https://dspace.unl.edu.ec//handle/123456789/585
https://dspace.unl.edu.ec//handle/123456789/728
https://dspace.unl.edu.ec//handle/123456789/2763
https://dspace.unl.edu.ec//handle/123456789/599
https://dspace.unl.edu.ec//handle/123456789/549
https://dspace.unl.edu.ec//handle/123456789/587
https://dspace.unl.edu.ec//handle/123456789/729
https://dspace.unl.edu.ec//handle/123456789/550
https://dspace.unl.edu.ec//handle/123456789/617
https://dspace.unl.edu.ec//handle/123456789/600
https://dspace.unl.edu.ec//handle/123456789/588
https://dspace.unl.edu.ec//handle/123456789/730
https://dspace.unl.edu.ec//handle/123456789/642
https://dspace.unl.edu.ec//handle/123456789/609
https://dspace.unl.edu.ec//handle/123456789/589
https://dspace.unl.edu.ec//handle/123456789/731
https://dspace.unl.edu.ec//handle/123456789/601
https://dspace.unl.edu.ec//handle/123456789/732
https://dspace.unl.edu.ec//handle/123456789/651
https://dspace.unl.edu.ec//handle/123456789/631
https://dspace.unl.edu.ec//handle/123456789/618
https://dspace.unl.edu.ec//handle/123456789/591
https://dspace.unl.edu.ec//handle/123456789/602
https://dspace.unl.edu.ec//handle/123456789/610
https://dspace.unl.edu.ec//handle/123456789/733
https://dspace.unl.edu.ec//handle/123456789/592
https://dspace.unl.edu.ec//handle/123456789/3092
https://dspace.unl.edu.ec//handle/123456789/603
https://dspace.unl.edu.ec//handle/123456789/734
https://dspace.unl.edu.ec//handle/123456789/593
https://dspace.unl.edu.ec//handle/123456789/625
https://dspace.unl.edu.ec//handle/123456789/735
https://dspace.unl.edu.ec//handle/123456789/3095
https://dspace.unl.edu.ec//handle/123456789/3096
https://dspace.unl.edu.ec//handle/123456789/611
https://dspace.unl.edu.ec//handle/123456789/758
https://dspace.unl.edu.ec//handle/123456789/604
https://dspace.unl.edu.ec//handle/123456789/619
https://dspace.unl.edu.ec//handle/123456789/612
https://dspace.unl.edu.ec//handle/123456789/759
https://dspace.unl.edu.ec//handle/123456789/605
https://dspace.unl.edu.ec//handle/123456789/639
https://dspace.unl.edu.ec//handle/123456789/635
https://dspace.unl.edu.ec//handle/123456789/626
https://dspace.unl.edu.ec//handle/123456789/760
https://dspace.unl.edu.ec//handle/123456789/620
https://dspace.unl.edu.ec//handle/123456789/613
https://dspace.unl.edu.ec//handle/123456789/614
https://dspace.unl.edu.ec//handle/123456789/632
https://dspace.unl.edu.ec//handle/123456789/627
https://dspace.unl.edu.ec//handle/123456789/622
https://dspace.unl.edu.ec//handle/123456789/628
https://dspace.unl.edu.ec//handle/123456789/623
https://dspace.unl.edu.ec//handle/123456789/645
https://dspace.unl.edu.ec//handle/123456789/629
https://dspace.unl.edu.ec//handle/123456789/636
https://dspace.unl.edu.ec//handle/123456789/633
https://dspace.unl.edu.ec//handle/123456789/643
https://dspace.unl.edu.ec//handle/123456789/640
https://dspace.unl.edu.ec//handle/123456789/637
https://dspace.unl.edu.ec//handle/123456789/634
https://dspace.unl.edu.ec//handle/123456789/638
https://dspace.unl.edu.ec//handle/123456789/648
https://dspace.unl.edu.ec//handle/123456789/641
https://dspace.unl.edu.ec//handle/123456789/646
https://dspace.unl.edu.ec//handle/123456789/644
https://dspace.unl.edu.ec//handle/123456789/650
https://dspace.unl.edu.ec//handle/123456789/656
https://dspace.unl.edu.ec//handle/123456789/647
https://dspace.unl.edu.ec//handle/123456789/649
https://dspace.unl.edu.ec//handle/123456789/654
https://dspace.unl.edu.ec//handle/123456789/653
https://dspace.unl.edu.ec//handle/123456789/652
https://dspace.unl.edu.ec//handle/123456789/655
https://dspace.unl.edu.ec//handle/123456789/361
https://dspace.unl.edu.ec//handle/123456789/586
https://dspace.unl.edu.ec//handle/123456789/565
https://dspace.unl.edu.ec//handle/123456789/502
https://dspace.unl.edu.ec//handle/123456789/516
https://dspace.unl.edu.ec//handle/123456789/552
https://dspace.unl.edu.ec//handle/123456789/503
https://dspace.unl.edu.ec//handle/123456789/517
https://dspace.unl.edu.ec//handle/123456789/666
https://dspace.unl.edu.ec//handle/123456789/737
https://dspace.unl.edu.ec//handle/123456789/553
https://dspace.unl.edu.ec//handle/123456789/506
https://dspace.unl.edu.ec//handle/123456789/519
https://dspace.unl.edu.ec//handle/123456789/1327
https://dspace.unl.edu.ec//handle/123456789/557
https://dspace.unl.edu.ec//handle/123456789/507
https://dspace.unl.edu.ec//handle/123456789/596
https://dspace.unl.edu.ec//handle/123456789/520
https://dspace.unl.edu.ec//handle/123456789/682
https://dspace.unl.edu.ec//handle/123456789/558
https://dspace.unl.edu.ec//handle/123456789/571
https://dspace.unl.edu.ec//handle/123456789/521
https://dspace.unl.edu.ec//handle/123456789/738
https://dspace.unl.edu.ec//handle/123456789/657
https://dspace.unl.edu.ec//handle/123456789/559
https://dspace.unl.edu.ec//handle/123456789/522
https://dspace.unl.edu.ec//handle/123456789/675
https://dspace.unl.edu.ec//handle/123456789/572
https://dspace.unl.edu.ec//handle/123456789/3124
https://dspace.unl.edu.ec//handle/123456789/523
https://dspace.unl.edu.ec//handle/123456789/560
https://dspace.unl.edu.ec//handle/123456789/667
https://dspace.unl.edu.ec//handle/123456789/739
https://dspace.unl.edu.ec//handle/123456789/524
https://dspace.unl.edu.ec//handle/123456789/658
https://dspace.unl.edu.ec//handle/123456789/573
https://dspace.unl.edu.ec//handle/123456789/561
https://dspace.unl.edu.ec//handle/123456789/525
https://dspace.unl.edu.ec//handle/123456789/688
https://dspace.unl.edu.ec//handle/123456789/562
https://dspace.unl.edu.ec//handle/123456789/574
https://dspace.unl.edu.ec//handle/123456789/740
https://dspace.unl.edu.ec//handle/123456789/526
https://dspace.unl.edu.ec//handle/123456789/3600
https://dspace.unl.edu.ec//handle/123456789/659
https://dspace.unl.edu.ec//handle/123456789/563
https://dspace.unl.edu.ec//handle/123456789/527
https://dspace.unl.edu.ec//handle/123456789/575
https://dspace.unl.edu.ec//handle/123456789/741
https://dspace.unl.edu.ec//handle/123456789/668
https://dspace.unl.edu.ec//handle/123456789/736
https://dspace.unl.edu.ec//handle/123456789/590
https://dspace.unl.edu.ec//handle/123456789/621
https://dspace.unl.edu.ec//handle/123456789/564
https://dspace.unl.edu.ec//handle/123456789/528
https://dspace.unl.edu.ec//handle/123456789/676
https://dspace.unl.edu.ec//handle/123456789/660
https://dspace.unl.edu.ec//handle/123456789/576
https://dspace.unl.edu.ec//handle/123456789/748
https://dspace.unl.edu.ec//handle/123456789/529
https://dspace.unl.edu.ec//handle/123456789/577
https://dspace.unl.edu.ec//handle/123456789/530
https://dspace.unl.edu.ec//handle/123456789/749
https://dspace.unl.edu.ec//handle/123456789/669
https://dspace.unl.edu.ec//handle/123456789/661
https://dspace.unl.edu.ec//handle/123456789/578
https://dspace.unl.edu.ec//handle/123456789/697
https://dspace.unl.edu.ec//handle/123456789/662
https://dspace.unl.edu.ec//handle/123456789/579
https://dspace.unl.edu.ec//handle/123456789/750
https://dspace.unl.edu.ec//handle/123456789/751
https://dspace.unl.edu.ec//handle/123456789/580
https://dspace.unl.edu.ec//handle/123456789/752
https://dspace.unl.edu.ec//handle/123456789/663
https://dspace.unl.edu.ec//handle/123456789/693
https://dspace.unl.edu.ec//handle/123456789/753
https://dspace.unl.edu.ec//handle/123456789/671
https://dspace.unl.edu.ec//handle/123456789/664
https://dspace.unl.edu.ec//handle/123456789/689
https://dspace.unl.edu.ec//handle/123456789/678
https://dspace.unl.edu.ec//handle/123456789/754
https://dspace.unl.edu.ec//handle/123456789/665
https://dspace.unl.edu.ec//handle/123456789/684
https://dspace.unl.edu.ec//handle/123456789/672
https://dspace.unl.edu.ec//handle/123456789/679
https://dspace.unl.edu.ec//handle/123456789/673
https://dspace.unl.edu.ec//handle/123456789/685
https://dspace.unl.edu.ec//handle/123456789/674
https://dspace.unl.edu.ec//handle/123456789/680
https://dspace.unl.edu.ec//handle/123456789/694
https://dspace.unl.edu.ec//handle/123456789/690
https://dspace.unl.edu.ec//handle/123456789/681
https://dspace.unl.edu.ec//handle/123456789/686
https://dspace.unl.edu.ec//handle/123456789/701
https://dspace.unl.edu.ec//handle/123456789/698
https://dspace.unl.edu.ec//handle/123456789/691
https://dspace.unl.edu.ec//handle/123456789/687
https://dspace.unl.edu.ec//handle/123456789/695
https://dspace.unl.edu.ec//handle/123456789/692
https://dspace.unl.edu.ec//handle/123456789/706
https://dspace.unl.edu.ec//handle/123456789/704
https://dspace.unl.edu.ec//handle/123456789/699
https://dspace.unl.edu.ec//handle/123456789/696
https://dspace.unl.edu.ec//handle/123456789/702
https://dspace.unl.edu.ec//handle/123456789/700
https://dspace.unl.edu.ec//handle/123456789/708
https://dspace.unl.edu.ec//handle/123456789/712
https://dspace.unl.edu.ec//handle/123456789/703
https://dspace.unl.edu.ec//handle/123456789/705
https://dspace.unl.edu.ec//handle/123456789/711
https://dspace.unl.edu.ec//handle/123456789/707
https://dspace.unl.edu.ec//handle/123456789/710
https://dspace.unl.edu.ec//handle/123456789/709
https://dspace.unl.edu.ec//handle/123456789/713
https://dspace.unl.edu.ec//handle/123456789/716
https://dspace.unl.edu.ec//handle/123456789/714
https://dspace.unl.edu.ec//handle/123456789/715
https://dspace.unl.edu.ec//handle/123456789/717
https://dspace.unl.edu.ec//handle/123456789/779
https://dspace.unl.edu.ec//handle/123456789/948
https://dspace.unl.edu.ec//handle/123456789/718
https://dspace.unl.edu.ec//handle/123456789/807
https://dspace.unl.edu.ec//handle/123456789/742
https://dspace.unl.edu.ec//handle/123456789/823
https://dspace.unl.edu.ec//handle/123456789/780
https://dspace.unl.edu.ec//handle/123456789/743
https://dspace.unl.edu.ec//handle/123456789/901
https://dspace.unl.edu.ec//handle/123456789/785
https://dspace.unl.edu.ec//handle/123456789/744
https://dspace.unl.edu.ec//handle/123456789/951
https://dspace.unl.edu.ec//handle/123456789/859
https://dspace.unl.edu.ec//handle/123456789/745
https://dspace.unl.edu.ec//handle/123456789/786
https://dspace.unl.edu.ec//handle/123456789/949
https://dspace.unl.edu.ec//handle/123456789/824
https://dspace.unl.edu.ec//handle/123456789/812
https://dspace.unl.edu.ec//handle/123456789/746
https://dspace.unl.edu.ec//handle/123456789/1328
https://dspace.unl.edu.ec//handle/123456789/787
https://dspace.unl.edu.ec//handle/123456789/747
https://dspace.unl.edu.ec//handle/123456789/761
https://dspace.unl.edu.ec//handle/123456789/897
https://dspace.unl.edu.ec//handle/123456789/788
https://dspace.unl.edu.ec//handle/123456789/994
https://dspace.unl.edu.ec//handle/123456789/762
https://dspace.unl.edu.ec//handle/123456789/889
https://dspace.unl.edu.ec//handle/123456789/825
https://dspace.unl.edu.ec//handle/123456789/763
https://dspace.unl.edu.ec//handle/123456789/789
https://dspace.unl.edu.ec//handle/123456789/974
https://dspace.unl.edu.ec//handle/123456789/995
https://dspace.unl.edu.ec//handle/123456789/814
https://dspace.unl.edu.ec//handle/123456789/764
https://dspace.unl.edu.ec//handle/123456789/988
https://dspace.unl.edu.ec//handle/123456789/790
https://dspace.unl.edu.ec//handle/123456789/774
https://dspace.unl.edu.ec//handle/123456789/860
https://dspace.unl.edu.ec//handle/123456789/881
https://dspace.unl.edu.ec//handle/123456789/874
https://dspace.unl.edu.ec//handle/123456789/791
https://dspace.unl.edu.ec//handle/123456789/795
https://dspace.unl.edu.ec//handle/123456789/996
https://dspace.unl.edu.ec//handle/123456789/815
https://dspace.unl.edu.ec//handle/123456789/683
https://dspace.unl.edu.ec//handle/123456789/950
https://dspace.unl.edu.ec//handle/123456789/1021
https://dspace.unl.edu.ec//handle/123456789/670
https://dspace.unl.edu.ec//handle/123456789/813
https://dspace.unl.edu.ec//handle/123456789/809
https://dspace.unl.edu.ec//handle/123456789/677
https://dspace.unl.edu.ec//handle/123456789/826
https://dspace.unl.edu.ec//handle/123456789/796
https://dspace.unl.edu.ec//handle/123456789/997
https://dspace.unl.edu.ec//handle/123456789/816
https://dspace.unl.edu.ec//handle/123456789/797
https://dspace.unl.edu.ec//handle/123456789/861
https://dspace.unl.edu.ec//handle/123456789/4579
https://dspace.unl.edu.ec//handle/123456789/827
https://dspace.unl.edu.ec//handle/123456789/798
https://dspace.unl.edu.ec//handle/123456789/2764
https://dspace.unl.edu.ec//handle/123456789/817
https://dspace.unl.edu.ec//handle/123456789/799
https://dspace.unl.edu.ec//handle/123456789/1001
https://dspace.unl.edu.ec//handle/123456789/800
https://dspace.unl.edu.ec//handle/123456789/818
https://dspace.unl.edu.ec//handle/123456789/1017
https://dspace.unl.edu.ec//handle/123456789/828
https://dspace.unl.edu.ec//handle/123456789/801
https://dspace.unl.edu.ec//handle/123456789/875
https://dspace.unl.edu.ec//handle/123456789/862
https://dspace.unl.edu.ec//handle/123456789/819
https://dspace.unl.edu.ec//handle/123456789/802
https://dspace.unl.edu.ec//handle/123456789/820
https://dspace.unl.edu.ec//handle/123456789/882
https://dspace.unl.edu.ec//handle/123456789/863
https://dspace.unl.edu.ec//handle/123456789/3528
https://dspace.unl.edu.ec//handle/123456789/822
https://dspace.unl.edu.ec//handle/123456789/876
https://dspace.unl.edu.ec//handle/123456789/864
https://dspace.unl.edu.ec//handle/123456789/845
https://dspace.unl.edu.ec//handle/123456789/924
https://dspace.unl.edu.ec//handle/123456789/847
https://dspace.unl.edu.ec//handle/123456789/890
https://dspace.unl.edu.ec//handle/123456789/865
https://dspace.unl.edu.ec//handle/123456789/877
https://dspace.unl.edu.ec//handle/123456789/848
https://dspace.unl.edu.ec//handle/123456789/883
https://dspace.unl.edu.ec//handle/123456789/866
https://dspace.unl.edu.ec//handle/123456789/878
https://dspace.unl.edu.ec//handle/123456789/872
https://dspace.unl.edu.ec//handle/123456789/898
https://dspace.unl.edu.ec//handle/123456789/884
https://dspace.unl.edu.ec//handle/123456789/891
https://dspace.unl.edu.ec//handle/123456789/902
https://dspace.unl.edu.ec//handle/123456789/885
https://dspace.unl.edu.ec//handle/123456789/880
https://dspace.unl.edu.ec//handle/123456789/899
https://dspace.unl.edu.ec//handle/123456789/892
https://dspace.unl.edu.ec//handle/123456789/886
https://dspace.unl.edu.ec//handle/123456789/893
https://dspace.unl.edu.ec//handle/123456789/903
https://dspace.unl.edu.ec//handle/123456789/900
https://dspace.unl.edu.ec//handle/123456789/912
https://dspace.unl.edu.ec//handle/123456789/908
https://dspace.unl.edu.ec//handle/123456789/923
https://dspace.unl.edu.ec//handle/123456789/925
https://dspace.unl.edu.ec//handle/123456789/755
https://dspace.unl.edu.ec//handle/123456789/811
https://dspace.unl.edu.ec//handle/123456789/719
https://dspace.unl.edu.ec//handle/123456789/778
https://dspace.unl.edu.ec//handle/123456789/964
https://dspace.unl.edu.ec//handle/123456789/756
https://dspace.unl.edu.ec//handle/123456789/720
https://dspace.unl.edu.ec//handle/123456789/887
https://dspace.unl.edu.ec//handle/123456789/757
https://dspace.unl.edu.ec//handle/123456789/781
https://dspace.unl.edu.ec//handle/123456789/721
https://dspace.unl.edu.ec//handle/123456789/952
https://dspace.unl.edu.ec//handle/123456789/830
https://dspace.unl.edu.ec//handle/123456789/765
https://dspace.unl.edu.ec//handle/123456789/1090
https://dspace.unl.edu.ec//handle/123456789/843
https://dspace.unl.edu.ec//handle/123456789/782
https://dspace.unl.edu.ec//handle/123456789/766
https://dspace.unl.edu.ec//handle/123456789/831
https://dspace.unl.edu.ec//handle/123456789/965
https://dspace.unl.edu.ec//handle/123456789/783
https://dspace.unl.edu.ec//handle/123456789/767