URL List

https://repositorio.upse.edu.ec/handle/46000/7378
https://repositorio.upse.edu.ec/handle/46000/7381
https://repositorio.upse.edu.ec/handle/46000/7383
https://repositorio.upse.edu.ec/handle/46000/7396
https://repositorio.upse.edu.ec/handle/46000/7404
https://repositorio.upse.edu.ec/handle/46000/7503
https://repositorio.upse.edu.ec/handle/46000/7476
https://repositorio.upse.edu.ec/handle/46000/7478
https://repositorio.upse.edu.ec/handle/46000/7479
https://repositorio.upse.edu.ec/handle/46000/7483
https://repositorio.upse.edu.ec/handle/46000/7513
https://repositorio.upse.edu.ec/handle/46000/7427
https://repositorio.upse.edu.ec/handle/46000/7462
https://repositorio.upse.edu.ec/handle/46000/7457
https://repositorio.upse.edu.ec/handle/46000/7379
https://repositorio.upse.edu.ec/handle/46000/7386
https://repositorio.upse.edu.ec/handle/46000/7388
https://repositorio.upse.edu.ec/handle/46000/7402
https://repositorio.upse.edu.ec/handle/46000/7495
https://repositorio.upse.edu.ec/handle/46000/7496
https://repositorio.upse.edu.ec/handle/46000/7497
https://repositorio.upse.edu.ec/handle/46000/7470
https://repositorio.upse.edu.ec/handle/46000/7473
https://repositorio.upse.edu.ec/handle/46000/7417
https://repositorio.upse.edu.ec/handle/46000/7420
https://repositorio.upse.edu.ec/handle/46000/7689
https://repositorio.upse.edu.ec/handle/46000/7384
https://repositorio.upse.edu.ec/handle/46000/7403
https://repositorio.upse.edu.ec/handle/46000/7416
https://repositorio.upse.edu.ec/handle/46000/7387
https://repositorio.upse.edu.ec/handle/46000/7390
https://repositorio.upse.edu.ec/handle/46000/7392
https://repositorio.upse.edu.ec/handle/46000/7399
https://repositorio.upse.edu.ec/handle/46000/7400
https://repositorio.upse.edu.ec/handle/46000/7401
https://repositorio.upse.edu.ec/handle/46000/7393
https://repositorio.upse.edu.ec/handle/46000/7394
https://repositorio.upse.edu.ec/handle/46000/7395
https://repositorio.upse.edu.ec/handle/46000/7406
https://repositorio.upse.edu.ec/handle/46000/7407
https://repositorio.upse.edu.ec/handle/46000/7409
https://repositorio.upse.edu.ec/handle/46000/7410
https://repositorio.upse.edu.ec/handle/46000/7411
https://repositorio.upse.edu.ec/handle/46000/7412
https://repositorio.upse.edu.ec/handle/46000/7397
https://repositorio.upse.edu.ec/handle/46000/7414
https://repositorio.upse.edu.ec/handle/46000/7415
https://repositorio.upse.edu.ec/handle/46000/7494
https://repositorio.upse.edu.ec/handle/46000/7505
https://repositorio.upse.edu.ec/handle/46000/7498
https://repositorio.upse.edu.ec/handle/46000/7499
https://repositorio.upse.edu.ec/handle/46000/7500
https://repositorio.upse.edu.ec/handle/46000/7504
https://repositorio.upse.edu.ec/handle/46000/7501
https://repositorio.upse.edu.ec/handle/46000/7506
https://repositorio.upse.edu.ec/handle/46000/7502
https://repositorio.upse.edu.ec/handle/46000/7468
https://repositorio.upse.edu.ec/handle/46000/7469
https://repositorio.upse.edu.ec/handle/46000/7507
https://repositorio.upse.edu.ec/handle/46000/7508
https://repositorio.upse.edu.ec/handle/46000/7474
https://repositorio.upse.edu.ec/handle/46000/7475
https://repositorio.upse.edu.ec/handle/46000/7482
https://repositorio.upse.edu.ec/handle/46000/7419
https://repositorio.upse.edu.ec/handle/46000/7430
https://repositorio.upse.edu.ec/handle/46000/7422
https://repositorio.upse.edu.ec/handle/46000/7423
https://repositorio.upse.edu.ec/handle/46000/7424
https://repositorio.upse.edu.ec/handle/46000/7425
https://repositorio.upse.edu.ec/handle/46000/7480
https://repositorio.upse.edu.ec/handle/46000/7471
https://repositorio.upse.edu.ec/handle/46000/7509
https://repositorio.upse.edu.ec/handle/46000/7481
https://repositorio.upse.edu.ec/handle/46000/7510
https://repositorio.upse.edu.ec/handle/46000/7511
https://repositorio.upse.edu.ec/handle/46000/7418
https://repositorio.upse.edu.ec/handle/46000/7428
https://repositorio.upse.edu.ec/handle/46000/7429
https://repositorio.upse.edu.ec/handle/46000/7463
https://repositorio.upse.edu.ec/handle/46000/7477
https://repositorio.upse.edu.ec/handle/46000/7472
https://repositorio.upse.edu.ec/handle/46000/7421
https://repositorio.upse.edu.ec/handle/46000/7458
https://repositorio.upse.edu.ec/handle/46000/7459
https://repositorio.upse.edu.ec/handle/46000/7460
https://repositorio.upse.edu.ec/handle/46000/7464
https://repositorio.upse.edu.ec/handle/46000/7924
https://repositorio.upse.edu.ec/handle/46000/7466
https://repositorio.upse.edu.ec/handle/46000/7461
https://repositorio.upse.edu.ec/handle/46000/7925
https://repositorio.upse.edu.ec/handle/46000/7926
https://repositorio.upse.edu.ec/handle/46000/7465
https://repositorio.upse.edu.ec/handle/46000/7927
https://repositorio.upse.edu.ec/handle/46000/7431
https://repositorio.upse.edu.ec/handle/46000/7467
https://repositorio.upse.edu.ec/handle/46000/7432
https://repositorio.upse.edu.ec/handle/46000/7928
https://repositorio.upse.edu.ec/handle/46000/7433
https://repositorio.upse.edu.ec/handle/46000/7436
https://repositorio.upse.edu.ec/handle/46000/7438
https://repositorio.upse.edu.ec/handle/46000/7439
https://repositorio.upse.edu.ec/handle/46000/7434
https://repositorio.upse.edu.ec/handle/46000/7442
https://repositorio.upse.edu.ec/handle/46000/7444
https://repositorio.upse.edu.ec/handle/46000/7453
https://repositorio.upse.edu.ec/handle/46000/7455
https://repositorio.upse.edu.ec/handle/46000/7456
https://repositorio.upse.edu.ec/handle/46000/7484
https://repositorio.upse.edu.ec/handle/46000/7485
https://repositorio.upse.edu.ec/handle/46000/7486
https://repositorio.upse.edu.ec/handle/46000/7491
https://repositorio.upse.edu.ec/handle/46000/7941
https://repositorio.upse.edu.ec/handle/46000/7942
https://repositorio.upse.edu.ec/handle/46000/7653
https://repositorio.upse.edu.ec/handle/46000/7654
https://repositorio.upse.edu.ec/handle/46000/7662
https://repositorio.upse.edu.ec/handle/46000/7646
https://repositorio.upse.edu.ec/handle/46000/7698
https://repositorio.upse.edu.ec/handle/46000/7445
https://repositorio.upse.edu.ec/handle/46000/7930
https://repositorio.upse.edu.ec/handle/46000/7932
https://repositorio.upse.edu.ec/handle/46000/7521
https://repositorio.upse.edu.ec/handle/46000/7492
https://repositorio.upse.edu.ec/handle/46000/7493
https://repositorio.upse.edu.ec/handle/46000/7943
https://repositorio.upse.edu.ec/handle/46000/7665
https://repositorio.upse.edu.ec/handle/46000/7668
https://repositorio.upse.edu.ec/handle/46000/7690
https://repositorio.upse.edu.ec/handle/46000/7692
https://repositorio.upse.edu.ec/handle/46000/7527
https://repositorio.upse.edu.ec/handle/46000/7536
https://repositorio.upse.edu.ec/handle/46000/7768
https://repositorio.upse.edu.ec/handle/46000/7744
https://repositorio.upse.edu.ec/handle/46000/7745
https://repositorio.upse.edu.ec/handle/46000/7532
https://repositorio.upse.edu.ec/handle/46000/7553
https://repositorio.upse.edu.ec/handle/46000/7540
https://repositorio.upse.edu.ec/handle/46000/7546
https://repositorio.upse.edu.ec/handle/46000/7551
https://repositorio.upse.edu.ec/handle/46000/7440
https://repositorio.upse.edu.ec/handle/46000/7448
https://repositorio.upse.edu.ec/handle/46000/7450
https://repositorio.upse.edu.ec/handle/46000/7452
https://repositorio.upse.edu.ec/handle/46000/7487
https://repositorio.upse.edu.ec/handle/46000/7515
https://repositorio.upse.edu.ec/handle/46000/7935
https://repositorio.upse.edu.ec/handle/46000/7517
https://repositorio.upse.edu.ec/handle/46000/7518
https://repositorio.upse.edu.ec/handle/46000/7936
https://repositorio.upse.edu.ec/handle/46000/7655
https://repositorio.upse.edu.ec/handle/46000/7666
https://repositorio.upse.edu.ec/handle/46000/7671
https://repositorio.upse.edu.ec/handle/46000/7672
https://repositorio.upse.edu.ec/handle/46000/7530
https://repositorio.upse.edu.ec/handle/46000/7535
https://repositorio.upse.edu.ec/handle/46000/7696
https://repositorio.upse.edu.ec/handle/46000/7554
https://repositorio.upse.edu.ec/handle/46000/7557
https://repositorio.upse.edu.ec/handle/46000/7544
https://repositorio.upse.edu.ec/handle/46000/7545
https://repositorio.upse.edu.ec/handle/46000/7558
https://repositorio.upse.edu.ec/handle/46000/7547
https://repositorio.upse.edu.ec/handle/46000/7577
https://repositorio.upse.edu.ec/handle/46000/7578
https://repositorio.upse.edu.ec/handle/46000/7592
https://repositorio.upse.edu.ec/handle/46000/7684
https://repositorio.upse.edu.ec/handle/46000/7437
https://repositorio.upse.edu.ec/handle/46000/7446
https://repositorio.upse.edu.ec/handle/46000/7449
https://repositorio.upse.edu.ec/handle/46000/7644
https://repositorio.upse.edu.ec/handle/46000/7700
https://repositorio.upse.edu.ec/handle/46000/7705
https://repositorio.upse.edu.ec/handle/46000/7707
https://repositorio.upse.edu.ec/handle/46000/7709
https://repositorio.upse.edu.ec/handle/46000/7708
https://repositorio.upse.edu.ec/handle/46000/7710
https://repositorio.upse.edu.ec/handle/46000/7713
https://repositorio.upse.edu.ec/handle/46000/7712
https://repositorio.upse.edu.ec/handle/46000/7723
https://repositorio.upse.edu.ec/handle/46000/7724
https://repositorio.upse.edu.ec/handle/46000/7729
https://repositorio.upse.edu.ec/handle/46000/7828
https://repositorio.upse.edu.ec/handle/46000/7829
https://repositorio.upse.edu.ec/handle/46000/7831
https://repositorio.upse.edu.ec/handle/46000/7733
https://repositorio.upse.edu.ec/handle/46000/7735
https://repositorio.upse.edu.ec/handle/46000/7841
https://repositorio.upse.edu.ec/handle/46000/7441
https://repositorio.upse.edu.ec/handle/46000/7443
https://repositorio.upse.edu.ec/handle/46000/7678
https://repositorio.upse.edu.ec/handle/46000/7538
https://repositorio.upse.edu.ec/handle/46000/7686
https://repositorio.upse.edu.ec/handle/46000/7772
https://repositorio.upse.edu.ec/handle/46000/7688
https://repositorio.upse.edu.ec/handle/46000/7583
https://repositorio.upse.edu.ec/handle/46000/7580
https://repositorio.upse.edu.ec/handle/46000/7758
https://repositorio.upse.edu.ec/handle/46000/7598
https://repositorio.upse.edu.ec/handle/46000/7599
https://repositorio.upse.edu.ec/handle/46000/7816
https://repositorio.upse.edu.ec/handle/46000/7817
https://repositorio.upse.edu.ec/handle/46000/7818
https://repositorio.upse.edu.ec/handle/46000/7819
https://repositorio.upse.edu.ec/handle/46000/7820
https://repositorio.upse.edu.ec/handle/46000/7821
https://repositorio.upse.edu.ec/handle/46000/7614
https://repositorio.upse.edu.ec/handle/46000/7627
https://repositorio.upse.edu.ec/handle/46000/7633
https://repositorio.upse.edu.ec/handle/46000/7807
https://repositorio.upse.edu.ec/handle/46000/7781
https://repositorio.upse.edu.ec/handle/46000/7827
https://repositorio.upse.edu.ec/handle/46000/7639
https://repositorio.upse.edu.ec/handle/46000/7641
https://repositorio.upse.edu.ec/handle/46000/7642
https://repositorio.upse.edu.ec/handle/46000/7663
https://repositorio.upse.edu.ec/handle/46000/7664
https://repositorio.upse.edu.ec/handle/46000/7667
https://repositorio.upse.edu.ec/handle/46000/7673
https://repositorio.upse.edu.ec/handle/46000/7674
https://repositorio.upse.edu.ec/handle/46000/7533
https://repositorio.upse.edu.ec/handle/46000/7675
https://repositorio.upse.edu.ec/handle/46000/7694
https://repositorio.upse.edu.ec/handle/46000/7767
https://repositorio.upse.edu.ec/handle/46000/7742
https://repositorio.upse.edu.ec/handle/46000/7695
https://repositorio.upse.edu.ec/handle/46000/7537
https://repositorio.upse.edu.ec/handle/46000/7541
https://repositorio.upse.edu.ec/handle/46000/7555
https://repositorio.upse.edu.ec/handle/46000/7542
https://repositorio.upse.edu.ec/handle/46000/7573
https://repositorio.upse.edu.ec/handle/46000/7567
https://repositorio.upse.edu.ec/handle/46000/7576
https://repositorio.upse.edu.ec/handle/46000/7591
https://repositorio.upse.edu.ec/handle/46000/7594
https://repositorio.upse.edu.ec/handle/46000/7681
https://repositorio.upse.edu.ec/handle/46000/7757
https://repositorio.upse.edu.ec/handle/46000/7774
https://repositorio.upse.edu.ec/handle/46000/7775
https://repositorio.upse.edu.ec/handle/46000/7752
https://repositorio.upse.edu.ec/handle/46000/7585
https://repositorio.upse.edu.ec/handle/46000/7588
https://repositorio.upse.edu.ec/handle/46000/7763
https://repositorio.upse.edu.ec/handle/46000/7447
https://repositorio.upse.edu.ec/handle/46000/7454
https://repositorio.upse.edu.ec/handle/46000/7488
https://repositorio.upse.edu.ec/handle/46000/7489
https://repositorio.upse.edu.ec/handle/46000/7929
https://repositorio.upse.edu.ec/handle/46000/7490
https://repositorio.upse.edu.ec/handle/46000/7931
https://repositorio.upse.edu.ec/handle/46000/7933
https://repositorio.upse.edu.ec/handle/46000/7435
https://repositorio.upse.edu.ec/handle/46000/7451
https://repositorio.upse.edu.ec/handle/46000/7934
https://repositorio.upse.edu.ec/handle/46000/7516
https://repositorio.upse.edu.ec/handle/46000/7519
https://repositorio.upse.edu.ec/handle/46000/7520
https://repositorio.upse.edu.ec/handle/46000/7937
https://repositorio.upse.edu.ec/handle/46000/7938
https://repositorio.upse.edu.ec/handle/46000/7939
https://repositorio.upse.edu.ec/handle/46000/7940
https://repositorio.upse.edu.ec/handle/46000/7650
https://repositorio.upse.edu.ec/handle/46000/7651
https://repositorio.upse.edu.ec/handle/46000/7652
https://repositorio.upse.edu.ec/handle/46000/7656
https://repositorio.upse.edu.ec/handle/46000/7657
https://repositorio.upse.edu.ec/handle/46000/7658
https://repositorio.upse.edu.ec/handle/46000/7659
https://repositorio.upse.edu.ec/handle/46000/7660
https://repositorio.upse.edu.ec/handle/46000/7661
https://repositorio.upse.edu.ec/handle/46000/7524
https://repositorio.upse.edu.ec/handle/46000/7525
https://repositorio.upse.edu.ec/handle/46000/7669
https://repositorio.upse.edu.ec/handle/46000/7528
https://repositorio.upse.edu.ec/handle/46000/7529
https://repositorio.upse.edu.ec/handle/46000/7534
https://repositorio.upse.edu.ec/handle/46000/7679
https://repositorio.upse.edu.ec/handle/46000/7697
https://repositorio.upse.edu.ec/handle/46000/7769
https://repositorio.upse.edu.ec/handle/46000/7759
https://repositorio.upse.edu.ec/handle/46000/7743
https://repositorio.upse.edu.ec/handle/46000/7552
https://repositorio.upse.edu.ec/handle/46000/7543
https://repositorio.upse.edu.ec/handle/46000/7548
https://repositorio.upse.edu.ec/handle/46000/7559
https://repositorio.upse.edu.ec/handle/46000/7549
https://repositorio.upse.edu.ec/handle/46000/7550
https://repositorio.upse.edu.ec/handle/46000/7564
https://repositorio.upse.edu.ec/handle/46000/7565
https://repositorio.upse.edu.ec/handle/46000/7568
https://repositorio.upse.edu.ec/handle/46000/7574
https://repositorio.upse.edu.ec/handle/46000/7571
https://repositorio.upse.edu.ec/handle/46000/7572
https://repositorio.upse.edu.ec/handle/46000/7575
https://repositorio.upse.edu.ec/handle/46000/7579
https://repositorio.upse.edu.ec/handle/46000/7593
https://repositorio.upse.edu.ec/handle/46000/7590
https://repositorio.upse.edu.ec/handle/46000/7691
https://repositorio.upse.edu.ec/handle/46000/7531
https://repositorio.upse.edu.ec/handle/46000/7556
https://repositorio.upse.edu.ec/handle/46000/7560
https://repositorio.upse.edu.ec/handle/46000/7561
https://repositorio.upse.edu.ec/handle/46000/7562
https://repositorio.upse.edu.ec/handle/46000/7581
https://repositorio.upse.edu.ec/handle/46000/7582
https://repositorio.upse.edu.ec/handle/46000/7773
https://repositorio.upse.edu.ec/handle/46000/7587
https://repositorio.upse.edu.ec/handle/46000/7760
https://repositorio.upse.edu.ec/handle/46000/7776
https://repositorio.upse.edu.ec/handle/46000/7762
https://repositorio.upse.edu.ec/handle/46000/7814
https://repositorio.upse.edu.ec/handle/46000/7605
https://repositorio.upse.edu.ec/handle/46000/7601
https://repositorio.upse.edu.ec/handle/46000/7608
https://repositorio.upse.edu.ec/handle/46000/7617
https://repositorio.upse.edu.ec/handle/46000/7620
https://repositorio.upse.edu.ec/handle/46000/7619
https://repositorio.upse.edu.ec/handle/46000/7754
https://repositorio.upse.edu.ec/handle/46000/8274
https://repositorio.upse.edu.ec/handle/46000/8276
https://repositorio.upse.edu.ec/handle/46000/7779
https://repositorio.upse.edu.ec/handle/46000/7778
https://repositorio.upse.edu.ec/handle/46000/7645
https://repositorio.upse.edu.ec/handle/46000/7670
https://repositorio.upse.edu.ec/handle/46000/7526
https://repositorio.upse.edu.ec/handle/46000/7676
https://repositorio.upse.edu.ec/handle/46000/7677
https://repositorio.upse.edu.ec/handle/46000/7693
https://repositorio.upse.edu.ec/handle/46000/7539
https://repositorio.upse.edu.ec/handle/46000/7563
https://repositorio.upse.edu.ec/handle/46000/7570
https://repositorio.upse.edu.ec/handle/46000/7680
https://repositorio.upse.edu.ec/handle/46000/7682
https://repositorio.upse.edu.ec/handle/46000/7683
https://repositorio.upse.edu.ec/handle/46000/7687
https://repositorio.upse.edu.ec/handle/46000/7747
https://repositorio.upse.edu.ec/handle/46000/7761
https://repositorio.upse.edu.ec/handle/46000/7589
https://repositorio.upse.edu.ec/handle/46000/7600
https://repositorio.upse.edu.ec/handle/46000/7606
https://repositorio.upse.edu.ec/handle/46000/7607
https://repositorio.upse.edu.ec/handle/46000/7602
https://repositorio.upse.edu.ec/handle/46000/7611
https://repositorio.upse.edu.ec/handle/46000/7632
https://repositorio.upse.edu.ec/handle/46000/7635
https://repositorio.upse.edu.ec/handle/46000/7790
https://repositorio.upse.edu.ec/handle/46000/7799
https://repositorio.upse.edu.ec/handle/46000/7566
https://repositorio.upse.edu.ec/handle/46000/7569
https://repositorio.upse.edu.ec/handle/46000/7746
https://repositorio.upse.edu.ec/handle/46000/7756
https://repositorio.upse.edu.ec/handle/46000/7612
https://repositorio.upse.edu.ec/handle/46000/7753
https://repositorio.upse.edu.ec/handle/46000/7777
https://repositorio.upse.edu.ec/handle/46000/7812
https://repositorio.upse.edu.ec/handle/46000/7822
https://repositorio.upse.edu.ec/handle/46000/7622
https://repositorio.upse.edu.ec/handle/46000/7636
https://repositorio.upse.edu.ec/handle/46000/7618
https://repositorio.upse.edu.ec/handle/46000/7791
https://repositorio.upse.edu.ec/handle/46000/7798
https://repositorio.upse.edu.ec/handle/46000/7795
https://repositorio.upse.edu.ec/handle/46000/7628
https://repositorio.upse.edu.ec/handle/46000/8275
https://repositorio.upse.edu.ec/handle/46000/7685
https://repositorio.upse.edu.ec/handle/46000/7748
https://repositorio.upse.edu.ec/handle/46000/7770
https://repositorio.upse.edu.ec/handle/46000/7771
https://repositorio.upse.edu.ec/handle/46000/7749
https://repositorio.upse.edu.ec/handle/46000/7584
https://repositorio.upse.edu.ec/handle/46000/7750
https://repositorio.upse.edu.ec/handle/46000/7751
https://repositorio.upse.edu.ec/handle/46000/7586
https://repositorio.upse.edu.ec/handle/46000/7764
https://repositorio.upse.edu.ec/handle/46000/7766
https://repositorio.upse.edu.ec/handle/46000/7808
https://repositorio.upse.edu.ec/handle/46000/7809
https://repositorio.upse.edu.ec/handle/46000/7810
https://repositorio.upse.edu.ec/handle/46000/7813
https://repositorio.upse.edu.ec/handle/46000/7610
https://repositorio.upse.edu.ec/handle/46000/7604
https://repositorio.upse.edu.ec/handle/46000/7615
https://repositorio.upse.edu.ec/handle/46000/7626
https://repositorio.upse.edu.ec/handle/46000/7625
https://repositorio.upse.edu.ec/handle/46000/7631
https://repositorio.upse.edu.ec/handle/46000/7621
https://repositorio.upse.edu.ec/handle/46000/7782
https://repositorio.upse.edu.ec/handle/46000/7786
https://repositorio.upse.edu.ec/handle/46000/7634
https://repositorio.upse.edu.ec/handle/46000/7787
https://repositorio.upse.edu.ec/handle/46000/7789
https://repositorio.upse.edu.ec/handle/46000/7765
https://repositorio.upse.edu.ec/handle/46000/7811
https://repositorio.upse.edu.ec/handle/46000/7609
https://repositorio.upse.edu.ec/handle/46000/7823
https://repositorio.upse.edu.ec/handle/46000/7830
https://repositorio.upse.edu.ec/handle/46000/7613
https://repositorio.upse.edu.ec/handle/46000/7623
https://repositorio.upse.edu.ec/handle/46000/7630
https://repositorio.upse.edu.ec/handle/46000/7785
https://repositorio.upse.edu.ec/handle/46000/7792
https://repositorio.upse.edu.ec/handle/46000/7796
https://repositorio.upse.edu.ec/handle/46000/7800
https://repositorio.upse.edu.ec/handle/46000/7783
https://repositorio.upse.edu.ec/handle/46000/7788
https://repositorio.upse.edu.ec/handle/46000/7806
https://repositorio.upse.edu.ec/handle/46000/7603
https://repositorio.upse.edu.ec/handle/46000/7815
https://repositorio.upse.edu.ec/handle/46000/7597
https://repositorio.upse.edu.ec/handle/46000/7824
https://repositorio.upse.edu.ec/handle/46000/7825
https://repositorio.upse.edu.ec/handle/46000/7629
https://repositorio.upse.edu.ec/handle/46000/7616
https://repositorio.upse.edu.ec/handle/46000/7637
https://repositorio.upse.edu.ec/handle/46000/7784