URL List

https://repositorio.upse.edu.ec/handle/46000/9526
https://repositorio.upse.edu.ec/handle/46000/9420
https://repositorio.upse.edu.ec/handle/46000/9436
https://repositorio.upse.edu.ec/handle/46000/9545
https://repositorio.upse.edu.ec/handle/46000/9449
https://repositorio.upse.edu.ec/handle/46000/9447
https://repositorio.upse.edu.ec/handle/46000/9437
https://repositorio.upse.edu.ec/handle/46000/9429
https://repositorio.upse.edu.ec/handle/46000/9457
https://repositorio.upse.edu.ec/handle/46000/9471
https://repositorio.upse.edu.ec/handle/46000/9466
https://repositorio.upse.edu.ec/handle/46000/9518
https://repositorio.upse.edu.ec/handle/46000/9558
https://repositorio.upse.edu.ec/handle/46000/9559
https://repositorio.upse.edu.ec/handle/46000/9546
https://repositorio.upse.edu.ec/handle/46000/9552
https://repositorio.upse.edu.ec/handle/46000/9580
https://repositorio.upse.edu.ec/handle/46000/9427
https://repositorio.upse.edu.ec/handle/46000/9426
https://repositorio.upse.edu.ec/handle/46000/9425
https://repositorio.upse.edu.ec/handle/46000/9597
https://repositorio.upse.edu.ec/handle/46000/9438
https://repositorio.upse.edu.ec/handle/46000/9435
https://repositorio.upse.edu.ec/handle/46000/9483
https://repositorio.upse.edu.ec/handle/46000/9469
https://repositorio.upse.edu.ec/handle/46000/9445
https://repositorio.upse.edu.ec/handle/46000/9442
https://repositorio.upse.edu.ec/handle/46000/9434
https://repositorio.upse.edu.ec/handle/46000/9431
https://repositorio.upse.edu.ec/handle/46000/9460
https://repositorio.upse.edu.ec/handle/46000/9459
https://repositorio.upse.edu.ec/handle/46000/9472
https://repositorio.upse.edu.ec/handle/46000/9474
https://repositorio.upse.edu.ec/handle/46000/9473
https://repositorio.upse.edu.ec/handle/46000/9487
https://repositorio.upse.edu.ec/handle/46000/9488
https://repositorio.upse.edu.ec/handle/46000/9494
https://repositorio.upse.edu.ec/handle/46000/9535
https://repositorio.upse.edu.ec/handle/46000/9501
https://repositorio.upse.edu.ec/handle/46000/9511
https://repositorio.upse.edu.ec/handle/46000/9510
https://repositorio.upse.edu.ec/handle/46000/9509
https://repositorio.upse.edu.ec/handle/46000/9508
https://repositorio.upse.edu.ec/handle/46000/9507
https://repositorio.upse.edu.ec/handle/46000/9512
https://repositorio.upse.edu.ec/handle/46000/9519
https://repositorio.upse.edu.ec/handle/46000/9514
https://repositorio.upse.edu.ec/handle/46000/9517
https://repositorio.upse.edu.ec/handle/46000/9520
https://repositorio.upse.edu.ec/handle/46000/9522
https://repositorio.upse.edu.ec/handle/46000/9524
https://repositorio.upse.edu.ec/handle/46000/9525
https://repositorio.upse.edu.ec/handle/46000/9527
https://repositorio.upse.edu.ec/handle/46000/9531
https://repositorio.upse.edu.ec/handle/46000/9562
https://repositorio.upse.edu.ec/handle/46000/9571
https://repositorio.upse.edu.ec/handle/46000/9574
https://repositorio.upse.edu.ec/handle/46000/9566
https://repositorio.upse.edu.ec/handle/46000/9554
https://repositorio.upse.edu.ec/handle/46000/9577
https://repositorio.upse.edu.ec/handle/46000/9586
https://repositorio.upse.edu.ec/handle/46000/9599
https://repositorio.upse.edu.ec/handle/46000/9602
https://repositorio.upse.edu.ec/handle/46000/9530
https://repositorio.upse.edu.ec/handle/46000/9537
https://repositorio.upse.edu.ec/handle/46000/9561
https://repositorio.upse.edu.ec/handle/46000/9569
https://repositorio.upse.edu.ec/handle/46000/9563
https://repositorio.upse.edu.ec/handle/46000/9568
https://repositorio.upse.edu.ec/handle/46000/9567
https://repositorio.upse.edu.ec/handle/46000/9565
https://repositorio.upse.edu.ec/handle/46000/9564
https://repositorio.upse.edu.ec/handle/46000/9560
https://repositorio.upse.edu.ec/handle/46000/9549
https://repositorio.upse.edu.ec/handle/46000/9538
https://repositorio.upse.edu.ec/handle/46000/9539
https://repositorio.upse.edu.ec/handle/46000/9547
https://repositorio.upse.edu.ec/handle/46000/9548
https://repositorio.upse.edu.ec/handle/46000/9557
https://repositorio.upse.edu.ec/handle/46000/9556
https://repositorio.upse.edu.ec/handle/46000/9555
https://repositorio.upse.edu.ec/handle/46000/9553
https://repositorio.upse.edu.ec/handle/46000/9551
https://repositorio.upse.edu.ec/handle/46000/9572
https://repositorio.upse.edu.ec/handle/46000/9573
https://repositorio.upse.edu.ec/handle/46000/9575
https://repositorio.upse.edu.ec/handle/46000/9576
https://repositorio.upse.edu.ec/handle/46000/9596
https://repositorio.upse.edu.ec/handle/46000/9578
https://repositorio.upse.edu.ec/handle/46000/9581
https://repositorio.upse.edu.ec/handle/46000/9588
https://repositorio.upse.edu.ec/handle/46000/9592
https://repositorio.upse.edu.ec/handle/46000/9582
https://repositorio.upse.edu.ec/handle/46000/9590
https://repositorio.upse.edu.ec/handle/46000/9595
https://repositorio.upse.edu.ec/handle/46000/9579
https://repositorio.upse.edu.ec/handle/46000/9584
https://repositorio.upse.edu.ec/handle/46000/9585
https://repositorio.upse.edu.ec/handle/46000/9600
https://repositorio.upse.edu.ec/handle/46000/9601
https://repositorio.upse.edu.ec/handle/46000/9603
https://repositorio.upse.edu.ec/handle/46000/9589
https://repositorio.upse.edu.ec/handle/46000/9591
https://repositorio.upse.edu.ec/handle/46000/9593
https://repositorio.upse.edu.ec/handle/46000/9583
https://repositorio.upse.edu.ec/handle/46000/9587
https://repositorio.upse.edu.ec/handle/46000/9594
https://repositorio.upse.edu.ec/handle/46000/9598
https://repositorio.upse.edu.ec/handle/46000/9604
https://repositorio.upse.edu.ec/handle/46000/9609
https://repositorio.upse.edu.ec/handle/46000/9608
https://repositorio.upse.edu.ec/handle/46000/9607
https://repositorio.upse.edu.ec/handle/46000/9606
https://repositorio.upse.edu.ec/handle/46000/9605
https://repositorio.upse.edu.ec/handle/46000/9620
https://repositorio.upse.edu.ec/handle/46000/9619
https://repositorio.upse.edu.ec/handle/46000/9617
https://repositorio.upse.edu.ec/handle/46000/9616
https://repositorio.upse.edu.ec/handle/46000/9615
https://repositorio.upse.edu.ec/handle/46000/9614
https://repositorio.upse.edu.ec/handle/46000/9613
https://repositorio.upse.edu.ec/handle/46000/9612
https://repositorio.upse.edu.ec/handle/46000/9618
https://repositorio.upse.edu.ec/handle/46000/9621
https://repositorio.upse.edu.ec/handle/46000/9622
https://repositorio.upse.edu.ec/handle/46000/9623
https://repositorio.upse.edu.ec/handle/46000/9624
https://repositorio.upse.edu.ec/handle/46000/9757
https://repositorio.upse.edu.ec/handle/46000/9684
https://repositorio.upse.edu.ec/handle/46000/9625
https://repositorio.upse.edu.ec/handle/46000/9685
https://repositorio.upse.edu.ec/handle/46000/9680
https://repositorio.upse.edu.ec/handle/46000/9686
https://repositorio.upse.edu.ec/handle/46000/9694
https://repositorio.upse.edu.ec/handle/46000/9698
https://repositorio.upse.edu.ec/handle/46000/9700
https://repositorio.upse.edu.ec/handle/46000/9637
https://repositorio.upse.edu.ec/handle/46000/9715
https://repositorio.upse.edu.ec/handle/46000/9708
https://repositorio.upse.edu.ec/handle/46000/9720
https://repositorio.upse.edu.ec/handle/46000/9721
https://repositorio.upse.edu.ec/handle/46000/9709
https://repositorio.upse.edu.ec/handle/46000/9724
https://repositorio.upse.edu.ec/handle/46000/9727
https://repositorio.upse.edu.ec/handle/46000/9728
https://repositorio.upse.edu.ec/handle/46000/9733
https://repositorio.upse.edu.ec/handle/46000/9651
https://repositorio.upse.edu.ec/handle/46000/9669
https://repositorio.upse.edu.ec/handle/46000/9634
https://repositorio.upse.edu.ec/handle/46000/9635
https://repositorio.upse.edu.ec/handle/46000/9639
https://repositorio.upse.edu.ec/handle/46000/9658
https://repositorio.upse.edu.ec/handle/46000/9649
https://repositorio.upse.edu.ec/handle/46000/9655
https://repositorio.upse.edu.ec/handle/46000/9668
https://repositorio.upse.edu.ec/handle/46000/9650
https://repositorio.upse.edu.ec/handle/46000/9638
https://repositorio.upse.edu.ec/handle/46000/9628
https://repositorio.upse.edu.ec/handle/46000/9630
https://repositorio.upse.edu.ec/handle/46000/9631
https://repositorio.upse.edu.ec/handle/46000/9633
https://repositorio.upse.edu.ec/handle/46000/9654
https://repositorio.upse.edu.ec/handle/46000/9670
https://repositorio.upse.edu.ec/handle/46000/9643
https://repositorio.upse.edu.ec/handle/46000/9664
https://repositorio.upse.edu.ec/handle/46000/9663
https://repositorio.upse.edu.ec/handle/46000/9662
https://repositorio.upse.edu.ec/handle/46000/9632
https://repositorio.upse.edu.ec/handle/46000/9656
https://repositorio.upse.edu.ec/handle/46000/9640
https://repositorio.upse.edu.ec/handle/46000/9661
https://repositorio.upse.edu.ec/handle/46000/9665
https://repositorio.upse.edu.ec/handle/46000/9629
https://repositorio.upse.edu.ec/handle/46000/9641
https://repositorio.upse.edu.ec/handle/46000/9644
https://repositorio.upse.edu.ec/handle/46000/9647
https://repositorio.upse.edu.ec/handle/46000/9626
https://repositorio.upse.edu.ec/handle/46000/9653
https://repositorio.upse.edu.ec/handle/46000/9627
https://repositorio.upse.edu.ec/handle/46000/9672
https://repositorio.upse.edu.ec/handle/46000/9646
https://repositorio.upse.edu.ec/handle/46000/9645
https://repositorio.upse.edu.ec/handle/46000/9642
https://repositorio.upse.edu.ec/handle/46000/9636
https://repositorio.upse.edu.ec/handle/46000/9659
https://repositorio.upse.edu.ec/handle/46000/9666
https://repositorio.upse.edu.ec/handle/46000/9675
https://repositorio.upse.edu.ec/handle/46000/9676
https://repositorio.upse.edu.ec/handle/46000/9678
https://repositorio.upse.edu.ec/handle/46000/9679
https://repositorio.upse.edu.ec/handle/46000/9683
https://repositorio.upse.edu.ec/handle/46000/9764
https://repositorio.upse.edu.ec/handle/46000/9704
https://repositorio.upse.edu.ec/handle/46000/9699
https://repositorio.upse.edu.ec/handle/46000/9726
https://repositorio.upse.edu.ec/handle/46000/9703
https://repositorio.upse.edu.ec/handle/46000/9710
https://repositorio.upse.edu.ec/handle/46000/9707
https://repositorio.upse.edu.ec/handle/46000/9716
https://repositorio.upse.edu.ec/handle/46000/9718
https://repositorio.upse.edu.ec/handle/46000/9736
https://repositorio.upse.edu.ec/handle/46000/9652
https://repositorio.upse.edu.ec/handle/46000/9648
https://repositorio.upse.edu.ec/handle/46000/9660
https://repositorio.upse.edu.ec/handle/46000/9671
https://repositorio.upse.edu.ec/handle/46000/9657
https://repositorio.upse.edu.ec/handle/46000/9667
https://repositorio.upse.edu.ec/handle/46000/9674
https://repositorio.upse.edu.ec/handle/46000/9677
https://repositorio.upse.edu.ec/handle/46000/9673
https://repositorio.upse.edu.ec/handle/46000/9681
https://repositorio.upse.edu.ec/handle/46000/9682
https://repositorio.upse.edu.ec/handle/46000/9688
https://repositorio.upse.edu.ec/handle/46000/9687
https://repositorio.upse.edu.ec/handle/46000/9689
https://repositorio.upse.edu.ec/handle/46000/9690
https://repositorio.upse.edu.ec/handle/46000/9691
https://repositorio.upse.edu.ec/handle/46000/9692
https://repositorio.upse.edu.ec/handle/46000/9693
https://repositorio.upse.edu.ec/handle/46000/9695
https://repositorio.upse.edu.ec/handle/46000/9696
https://repositorio.upse.edu.ec/handle/46000/9697
https://repositorio.upse.edu.ec/handle/46000/9701
https://repositorio.upse.edu.ec/handle/46000/9702
https://repositorio.upse.edu.ec/handle/46000/9706
https://repositorio.upse.edu.ec/handle/46000/9732
https://repositorio.upse.edu.ec/handle/46000/9734
https://repositorio.upse.edu.ec/handle/46000/9742
https://repositorio.upse.edu.ec/handle/46000/9737
https://repositorio.upse.edu.ec/handle/46000/9750
https://repositorio.upse.edu.ec/handle/46000/9705
https://repositorio.upse.edu.ec/handle/46000/9711
https://repositorio.upse.edu.ec/handle/46000/9712
https://repositorio.upse.edu.ec/handle/46000/9713
https://repositorio.upse.edu.ec/handle/46000/9719
https://repositorio.upse.edu.ec/handle/46000/9725
https://repositorio.upse.edu.ec/handle/46000/9729
https://repositorio.upse.edu.ec/handle/46000/9730
https://repositorio.upse.edu.ec/handle/46000/9731
https://repositorio.upse.edu.ec/handle/46000/9743
https://repositorio.upse.edu.ec/handle/46000/9745
https://repositorio.upse.edu.ec/handle/46000/9748
https://repositorio.upse.edu.ec/handle/46000/9749
https://repositorio.upse.edu.ec/handle/46000/9758
https://repositorio.upse.edu.ec/handle/46000/9714
https://repositorio.upse.edu.ec/handle/46000/9722
https://repositorio.upse.edu.ec/handle/46000/9735
https://repositorio.upse.edu.ec/handle/46000/9754
https://repositorio.upse.edu.ec/handle/46000/9753
https://repositorio.upse.edu.ec/handle/46000/9746
https://repositorio.upse.edu.ec/handle/46000/9747
https://repositorio.upse.edu.ec/handle/46000/9752
https://repositorio.upse.edu.ec/handle/46000/9759
https://repositorio.upse.edu.ec/handle/46000/9760
https://repositorio.upse.edu.ec/handle/46000/9762
https://repositorio.upse.edu.ec/handle/46000/9765
https://repositorio.upse.edu.ec/handle/46000/9717
https://repositorio.upse.edu.ec/handle/46000/9723
https://repositorio.upse.edu.ec/handle/46000/9740
https://repositorio.upse.edu.ec/handle/46000/9741
https://repositorio.upse.edu.ec/handle/46000/9755
https://repositorio.upse.edu.ec/handle/46000/9761
https://repositorio.upse.edu.ec/handle/46000/9744
https://repositorio.upse.edu.ec/handle/46000/9751
https://repositorio.upse.edu.ec/handle/46000/9756
https://repositorio.upse.edu.ec/handle/46000/9763
https://repositorio.upse.edu.ec/handle/46000/9739
https://repositorio.upse.edu.ec/handle/46000/9738
https://repositorio.upse.edu.ec/handle/46000/9770
https://repositorio.upse.edu.ec/handle/46000/9771
https://repositorio.upse.edu.ec/handle/46000/9772
https://repositorio.upse.edu.ec/handle/46000/9773
https://repositorio.upse.edu.ec/handle/46000/9774
https://repositorio.upse.edu.ec/handle/46000/9769
https://repositorio.upse.edu.ec/handle/46000/9768
https://repositorio.upse.edu.ec/handle/46000/9767
https://repositorio.upse.edu.ec/handle/46000/9766
https://repositorio.upse.edu.ec/handle/46000/9775
https://repositorio.upse.edu.ec/handle/46000/9776
https://repositorio.upse.edu.ec/handle/46000/9777
https://repositorio.upse.edu.ec/handle/46000/9778
https://repositorio.upse.edu.ec/handle/46000/9779
https://repositorio.upse.edu.ec/handle/46000/9780
https://repositorio.upse.edu.ec/handle/46000/9781
https://repositorio.upse.edu.ec/handle/46000/9782
https://repositorio.upse.edu.ec/handle/46000/9783
https://repositorio.upse.edu.ec/handle/46000/9787
https://repositorio.upse.edu.ec/handle/46000/9785
https://repositorio.upse.edu.ec/handle/46000/9790
https://repositorio.upse.edu.ec/handle/46000/9786
https://repositorio.upse.edu.ec/handle/46000/9789
https://repositorio.upse.edu.ec/handle/46000/9788
https://repositorio.upse.edu.ec/handle/46000/9791
https://repositorio.upse.edu.ec/handle/46000/9805
https://repositorio.upse.edu.ec/handle/46000/9792
https://repositorio.upse.edu.ec/handle/46000/9809
https://repositorio.upse.edu.ec/handle/46000/9810
https://repositorio.upse.edu.ec/handle/46000/9793
https://repositorio.upse.edu.ec/handle/46000/9796
https://repositorio.upse.edu.ec/handle/46000/9794
https://repositorio.upse.edu.ec/handle/46000/9797
https://repositorio.upse.edu.ec/handle/46000/9795
https://repositorio.upse.edu.ec/handle/46000/9798
https://repositorio.upse.edu.ec/handle/46000/9799
https://repositorio.upse.edu.ec/handle/46000/9803
https://repositorio.upse.edu.ec/handle/46000/9804
https://repositorio.upse.edu.ec/handle/46000/9801
https://repositorio.upse.edu.ec/handle/46000/9800
https://repositorio.upse.edu.ec/handle/46000/9802
https://repositorio.upse.edu.ec/handle/46000/9807
https://repositorio.upse.edu.ec/handle/46000/9806
https://repositorio.upse.edu.ec/handle/46000/9808
https://repositorio.upse.edu.ec/handle/46000/9811
https://repositorio.upse.edu.ec/handle/46000/9813
https://repositorio.upse.edu.ec/handle/46000/9814
https://repositorio.upse.edu.ec/handle/46000/9812
https://repositorio.upse.edu.ec/handle/46000/9815
https://repositorio.upse.edu.ec/handle/46000/9816
https://repositorio.upse.edu.ec/handle/46000/9817
https://repositorio.upse.edu.ec/handle/46000/9818
https://repositorio.upse.edu.ec/handle/46000/9820
https://repositorio.upse.edu.ec/handle/46000/9819
https://repositorio.upse.edu.ec/handle/46000/9825
https://repositorio.upse.edu.ec/handle/46000/9821
https://repositorio.upse.edu.ec/handle/46000/9823
https://repositorio.upse.edu.ec/handle/46000/9822
https://repositorio.upse.edu.ec/handle/46000/9824
https://repositorio.upse.edu.ec/handle/46000/9912
https://repositorio.upse.edu.ec/handle/46000/9826
https://repositorio.upse.edu.ec/handle/46000/9827
https://repositorio.upse.edu.ec/handle/46000/9828
https://repositorio.upse.edu.ec/handle/46000/9829
https://repositorio.upse.edu.ec/handle/46000/9834
https://repositorio.upse.edu.ec/handle/46000/9830
https://repositorio.upse.edu.ec/handle/46000/9831
https://repositorio.upse.edu.ec/handle/46000/9832
https://repositorio.upse.edu.ec/handle/46000/9833
https://repositorio.upse.edu.ec/handle/46000/9841
https://repositorio.upse.edu.ec/handle/46000/9835
https://repositorio.upse.edu.ec/handle/46000/9836
https://repositorio.upse.edu.ec/handle/46000/9837
https://repositorio.upse.edu.ec/handle/46000/9838
https://repositorio.upse.edu.ec/handle/46000/9840
https://repositorio.upse.edu.ec/handle/46000/9839
https://repositorio.upse.edu.ec/handle/46000/9843
https://repositorio.upse.edu.ec/handle/46000/9842
https://repositorio.upse.edu.ec/handle/46000/9844
https://repositorio.upse.edu.ec/handle/46000/9847
https://repositorio.upse.edu.ec/handle/46000/9848
https://repositorio.upse.edu.ec/handle/46000/9849
https://repositorio.upse.edu.ec/handle/46000/9850
https://repositorio.upse.edu.ec/handle/46000/9852
https://repositorio.upse.edu.ec/handle/46000/9854
https://repositorio.upse.edu.ec/handle/46000/9859
https://repositorio.upse.edu.ec/handle/46000/9860
https://repositorio.upse.edu.ec/handle/46000/9863
https://repositorio.upse.edu.ec/handle/46000/9855
https://repositorio.upse.edu.ec/handle/46000/9866
https://repositorio.upse.edu.ec/handle/46000/9874
https://repositorio.upse.edu.ec/handle/46000/9876
https://repositorio.upse.edu.ec/handle/46000/9879
https://repositorio.upse.edu.ec/handle/46000/9880
https://repositorio.upse.edu.ec/handle/46000/9885
https://repositorio.upse.edu.ec/handle/46000/9892
https://repositorio.upse.edu.ec/handle/46000/9857
https://repositorio.upse.edu.ec/handle/46000/9867
https://repositorio.upse.edu.ec/handle/46000/9871
https://repositorio.upse.edu.ec/handle/46000/9868
https://repositorio.upse.edu.ec/handle/46000/9872
https://repositorio.upse.edu.ec/handle/46000/9878
https://repositorio.upse.edu.ec/handle/46000/9884
https://repositorio.upse.edu.ec/handle/46000/9886
https://repositorio.upse.edu.ec/handle/46000/9887
https://repositorio.upse.edu.ec/handle/46000/9894
https://repositorio.upse.edu.ec/handle/46000/9914
https://repositorio.upse.edu.ec/handle/46000/9915
https://repositorio.upse.edu.ec/handle/46000/9917
https://repositorio.upse.edu.ec/handle/46000/9994
https://repositorio.upse.edu.ec/handle/46000/10020
https://repositorio.upse.edu.ec/handle/46000/9930
https://repositorio.upse.edu.ec/handle/46000/9925
https://repositorio.upse.edu.ec/handle/46000/9931
https://repositorio.upse.edu.ec/handle/46000/9928
https://repositorio.upse.edu.ec/handle/46000/9953
https://repositorio.upse.edu.ec/handle/46000/9958
https://repositorio.upse.edu.ec/handle/46000/9845
https://repositorio.upse.edu.ec/handle/46000/9846
https://repositorio.upse.edu.ec/handle/46000/9856
https://repositorio.upse.edu.ec/handle/46000/9851
https://repositorio.upse.edu.ec/handle/46000/9853
https://repositorio.upse.edu.ec/handle/46000/9858
https://repositorio.upse.edu.ec/handle/46000/9861
https://repositorio.upse.edu.ec/handle/46000/9862
https://repositorio.upse.edu.ec/handle/46000/9864
https://repositorio.upse.edu.ec/handle/46000/9870
https://repositorio.upse.edu.ec/handle/46000/9865
https://repositorio.upse.edu.ec/handle/46000/9869
https://repositorio.upse.edu.ec/handle/46000/9873
https://repositorio.upse.edu.ec/handle/46000/9875
https://repositorio.upse.edu.ec/handle/46000/9877
https://repositorio.upse.edu.ec/handle/46000/9881
https://repositorio.upse.edu.ec/handle/46000/9924
https://repositorio.upse.edu.ec/handle/46000/9882
https://repositorio.upse.edu.ec/handle/46000/9883
https://repositorio.upse.edu.ec/handle/46000/9891
https://repositorio.upse.edu.ec/handle/46000/9888
https://repositorio.upse.edu.ec/handle/46000/9900
https://repositorio.upse.edu.ec/handle/46000/9889
https://repositorio.upse.edu.ec/handle/46000/9890
https://repositorio.upse.edu.ec/handle/46000/9897
https://repositorio.upse.edu.ec/handle/46000/9896
https://repositorio.upse.edu.ec/handle/46000/9899
https://repositorio.upse.edu.ec/handle/46000/9893
https://repositorio.upse.edu.ec/handle/46000/9907