URL List

https://repositorio.upse.edu.ec/handle/46000/5608
https://repositorio.upse.edu.ec/handle/46000/5609
https://repositorio.upse.edu.ec/handle/46000/5623
https://repositorio.upse.edu.ec/handle/46000/5624
https://repositorio.upse.edu.ec/handle/46000/5632
https://repositorio.upse.edu.ec/handle/46000/5635
https://repositorio.upse.edu.ec/handle/46000/5615
https://repositorio.upse.edu.ec/handle/46000/5616
https://repositorio.upse.edu.ec/handle/46000/5619
https://repositorio.upse.edu.ec/handle/46000/5620
https://repositorio.upse.edu.ec/handle/46000/5628
https://repositorio.upse.edu.ec/handle/46000/5650
https://repositorio.upse.edu.ec/handle/46000/5607
https://repositorio.upse.edu.ec/handle/46000/5627
https://repositorio.upse.edu.ec/handle/46000/5639
https://repositorio.upse.edu.ec/handle/46000/5646
https://repositorio.upse.edu.ec/handle/46000/5648
https://repositorio.upse.edu.ec/handle/46000/5649
https://repositorio.upse.edu.ec/handle/46000/5625
https://repositorio.upse.edu.ec/handle/46000/5629
https://repositorio.upse.edu.ec/handle/46000/5630
https://repositorio.upse.edu.ec/handle/46000/5631
https://repositorio.upse.edu.ec/handle/46000/5633
https://repositorio.upse.edu.ec/handle/46000/5634
https://repositorio.upse.edu.ec/handle/46000/5636
https://repositorio.upse.edu.ec/handle/46000/5637
https://repositorio.upse.edu.ec/handle/46000/5638
https://repositorio.upse.edu.ec/handle/46000/5640
https://repositorio.upse.edu.ec/handle/46000/5642
https://repositorio.upse.edu.ec/handle/46000/5643
https://repositorio.upse.edu.ec/handle/46000/5644
https://repositorio.upse.edu.ec/handle/46000/5653
https://repositorio.upse.edu.ec/handle/46000/5645
https://repositorio.upse.edu.ec/handle/46000/5641
https://repositorio.upse.edu.ec/handle/46000/5652
https://repositorio.upse.edu.ec/handle/46000/5658
https://repositorio.upse.edu.ec/handle/46000/5659
https://repositorio.upse.edu.ec/handle/46000/5660
https://repositorio.upse.edu.ec/handle/46000/5661
https://repositorio.upse.edu.ec/handle/46000/5665
https://repositorio.upse.edu.ec/handle/46000/5662
https://repositorio.upse.edu.ec/handle/46000/5663
https://repositorio.upse.edu.ec/handle/46000/5664
https://repositorio.upse.edu.ec/handle/46000/5666
https://repositorio.upse.edu.ec/handle/46000/5667
https://repositorio.upse.edu.ec/handle/46000/5668
https://repositorio.upse.edu.ec/handle/46000/5669
https://repositorio.upse.edu.ec/handle/46000/5670
https://repositorio.upse.edu.ec/handle/46000/5671
https://repositorio.upse.edu.ec/handle/46000/5672
https://repositorio.upse.edu.ec/handle/46000/5673
https://repositorio.upse.edu.ec/handle/46000/5674
https://repositorio.upse.edu.ec/handle/46000/5675
https://repositorio.upse.edu.ec/handle/46000/5676
https://repositorio.upse.edu.ec/handle/46000/5677
https://repositorio.upse.edu.ec/handle/46000/5678
https://repositorio.upse.edu.ec/handle/46000/5680
https://repositorio.upse.edu.ec/handle/46000/5679
https://repositorio.upse.edu.ec/handle/46000/5681
https://repositorio.upse.edu.ec/handle/46000/5682
https://repositorio.upse.edu.ec/handle/46000/5683
https://repositorio.upse.edu.ec/handle/46000/5684
https://repositorio.upse.edu.ec/handle/46000/5685
https://repositorio.upse.edu.ec/handle/46000/5686
https://repositorio.upse.edu.ec/handle/46000/5687
https://repositorio.upse.edu.ec/handle/46000/5688
https://repositorio.upse.edu.ec/handle/46000/5689
https://repositorio.upse.edu.ec/handle/46000/5690
https://repositorio.upse.edu.ec/handle/46000/5691
https://repositorio.upse.edu.ec/handle/46000/5692
https://repositorio.upse.edu.ec/handle/46000/5693
https://repositorio.upse.edu.ec/handle/46000/5694
https://repositorio.upse.edu.ec/handle/46000/5695
https://repositorio.upse.edu.ec/handle/46000/5696
https://repositorio.upse.edu.ec/handle/46000/5697
https://repositorio.upse.edu.ec/handle/46000/5698
https://repositorio.upse.edu.ec/handle/46000/5699
https://repositorio.upse.edu.ec/handle/46000/5700
https://repositorio.upse.edu.ec/handle/46000/5701
https://repositorio.upse.edu.ec/handle/46000/5702
https://repositorio.upse.edu.ec/handle/46000/5703
https://repositorio.upse.edu.ec/handle/46000/5704
https://repositorio.upse.edu.ec/handle/46000/5705
https://repositorio.upse.edu.ec/handle/46000/5706
https://repositorio.upse.edu.ec/handle/46000/5707
https://repositorio.upse.edu.ec/handle/46000/5708
https://repositorio.upse.edu.ec/handle/46000/5709
https://repositorio.upse.edu.ec/handle/46000/5710
https://repositorio.upse.edu.ec/handle/46000/5711
https://repositorio.upse.edu.ec/handle/46000/5714
https://repositorio.upse.edu.ec/handle/46000/5717
https://repositorio.upse.edu.ec/handle/46000/5712
https://repositorio.upse.edu.ec/handle/46000/5713
https://repositorio.upse.edu.ec/handle/46000/5718
https://repositorio.upse.edu.ec/handle/46000/5719
https://repositorio.upse.edu.ec/handle/46000/5720
https://repositorio.upse.edu.ec/handle/46000/5721
https://repositorio.upse.edu.ec/handle/46000/5715
https://repositorio.upse.edu.ec/handle/46000/5716
https://repositorio.upse.edu.ec/handle/46000/5722
https://repositorio.upse.edu.ec/handle/46000/5723
https://repositorio.upse.edu.ec/handle/46000/5724
https://repositorio.upse.edu.ec/handle/46000/5725
https://repositorio.upse.edu.ec/handle/46000/5726
https://repositorio.upse.edu.ec/handle/46000/5727
https://repositorio.upse.edu.ec/handle/46000/5728
https://repositorio.upse.edu.ec/handle/46000/5729
https://repositorio.upse.edu.ec/handle/46000/5730
https://repositorio.upse.edu.ec/handle/46000/5731
https://repositorio.upse.edu.ec/handle/46000/5732
https://repositorio.upse.edu.ec/handle/46000/5733
https://repositorio.upse.edu.ec/handle/46000/5734
https://repositorio.upse.edu.ec/handle/46000/5735
https://repositorio.upse.edu.ec/handle/46000/5736
https://repositorio.upse.edu.ec/handle/46000/5737
https://repositorio.upse.edu.ec/handle/46000/5738
https://repositorio.upse.edu.ec/handle/46000/5739
https://repositorio.upse.edu.ec/handle/46000/5740
https://repositorio.upse.edu.ec/handle/46000/5741
https://repositorio.upse.edu.ec/handle/46000/5742
https://repositorio.upse.edu.ec/handle/46000/5743
https://repositorio.upse.edu.ec/handle/46000/5744
https://repositorio.upse.edu.ec/handle/46000/5745
https://repositorio.upse.edu.ec/handle/46000/5746
https://repositorio.upse.edu.ec/handle/46000/5747
https://repositorio.upse.edu.ec/handle/46000/5748
https://repositorio.upse.edu.ec/handle/46000/5749
https://repositorio.upse.edu.ec/handle/46000/5750
https://repositorio.upse.edu.ec/handle/46000/5751
https://repositorio.upse.edu.ec/handle/46000/5753
https://repositorio.upse.edu.ec/handle/46000/5754
https://repositorio.upse.edu.ec/handle/46000/5752
https://repositorio.upse.edu.ec/handle/46000/5755
https://repositorio.upse.edu.ec/handle/46000/5756
https://repositorio.upse.edu.ec/handle/46000/5757
https://repositorio.upse.edu.ec/handle/46000/5758
https://repositorio.upse.edu.ec/handle/46000/5759
https://repositorio.upse.edu.ec/handle/46000/5763
https://repositorio.upse.edu.ec/handle/46000/5764
https://repositorio.upse.edu.ec/handle/46000/5765
https://repositorio.upse.edu.ec/handle/46000/5766
https://repositorio.upse.edu.ec/handle/46000/5767
https://repositorio.upse.edu.ec/handle/46000/5768
https://repositorio.upse.edu.ec/handle/46000/5769
https://repositorio.upse.edu.ec/handle/46000/5771
https://repositorio.upse.edu.ec/handle/46000/5772
https://repositorio.upse.edu.ec/handle/46000/5773
https://repositorio.upse.edu.ec/handle/46000/5774
https://repositorio.upse.edu.ec/handle/46000/5775
https://repositorio.upse.edu.ec/handle/46000/5777
https://repositorio.upse.edu.ec/handle/46000/5779
https://repositorio.upse.edu.ec/handle/46000/5783
https://repositorio.upse.edu.ec/handle/46000/5784
https://repositorio.upse.edu.ec/handle/46000/5789
https://repositorio.upse.edu.ec/handle/46000/5790
https://repositorio.upse.edu.ec/handle/46000/5791
https://repositorio.upse.edu.ec/handle/46000/5794
https://repositorio.upse.edu.ec/handle/46000/5796
https://repositorio.upse.edu.ec/handle/46000/5798
https://repositorio.upse.edu.ec/handle/46000/5812
https://repositorio.upse.edu.ec/handle/46000/5815
https://repositorio.upse.edu.ec/handle/46000/5817
https://repositorio.upse.edu.ec/handle/46000/5819
https://repositorio.upse.edu.ec/handle/46000/5760
https://repositorio.upse.edu.ec/handle/46000/5761
https://repositorio.upse.edu.ec/handle/46000/5762
https://repositorio.upse.edu.ec/handle/46000/5770
https://repositorio.upse.edu.ec/handle/46000/5776
https://repositorio.upse.edu.ec/handle/46000/5778
https://repositorio.upse.edu.ec/handle/46000/5780
https://repositorio.upse.edu.ec/handle/46000/5781
https://repositorio.upse.edu.ec/handle/46000/5782
https://repositorio.upse.edu.ec/handle/46000/5785
https://repositorio.upse.edu.ec/handle/46000/5786
https://repositorio.upse.edu.ec/handle/46000/5787
https://repositorio.upse.edu.ec/handle/46000/5788
https://repositorio.upse.edu.ec/handle/46000/5792
https://repositorio.upse.edu.ec/handle/46000/5793
https://repositorio.upse.edu.ec/handle/46000/5795
https://repositorio.upse.edu.ec/handle/46000/5797
https://repositorio.upse.edu.ec/handle/46000/5799
https://repositorio.upse.edu.ec/handle/46000/5800
https://repositorio.upse.edu.ec/handle/46000/5801
https://repositorio.upse.edu.ec/handle/46000/5802
https://repositorio.upse.edu.ec/handle/46000/5803
https://repositorio.upse.edu.ec/handle/46000/5804
https://repositorio.upse.edu.ec/handle/46000/5805
https://repositorio.upse.edu.ec/handle/46000/5806
https://repositorio.upse.edu.ec/handle/46000/5807
https://repositorio.upse.edu.ec/handle/46000/5808
https://repositorio.upse.edu.ec/handle/46000/5822
https://repositorio.upse.edu.ec/handle/46000/5823
https://repositorio.upse.edu.ec/handle/46000/5828
https://repositorio.upse.edu.ec/handle/46000/5831
https://repositorio.upse.edu.ec/handle/46000/5832
https://repositorio.upse.edu.ec/handle/46000/5836
https://repositorio.upse.edu.ec/handle/46000/5838
https://repositorio.upse.edu.ec/handle/46000/5847
https://repositorio.upse.edu.ec/handle/46000/5809
https://repositorio.upse.edu.ec/handle/46000/5810
https://repositorio.upse.edu.ec/handle/46000/5811
https://repositorio.upse.edu.ec/handle/46000/5818
https://repositorio.upse.edu.ec/handle/46000/5820
https://repositorio.upse.edu.ec/handle/46000/5829
https://repositorio.upse.edu.ec/handle/46000/5833
https://repositorio.upse.edu.ec/handle/46000/5813
https://repositorio.upse.edu.ec/handle/46000/5814
https://repositorio.upse.edu.ec/handle/46000/5835
https://repositorio.upse.edu.ec/handle/46000/5837
https://repositorio.upse.edu.ec/handle/46000/5816
https://repositorio.upse.edu.ec/handle/46000/5824
https://repositorio.upse.edu.ec/handle/46000/5825
https://repositorio.upse.edu.ec/handle/46000/5821
https://repositorio.upse.edu.ec/handle/46000/5826
https://repositorio.upse.edu.ec/handle/46000/5827
https://repositorio.upse.edu.ec/handle/46000/5830
https://repositorio.upse.edu.ec/handle/46000/5834
https://repositorio.upse.edu.ec/handle/46000/5841
https://repositorio.upse.edu.ec/handle/46000/5843
https://repositorio.upse.edu.ec/handle/46000/5845
https://repositorio.upse.edu.ec/handle/46000/5846
https://repositorio.upse.edu.ec/handle/46000/5848
https://repositorio.upse.edu.ec/handle/46000/5849
https://repositorio.upse.edu.ec/handle/46000/5854
https://repositorio.upse.edu.ec/handle/46000/5850
https://repositorio.upse.edu.ec/handle/46000/5851
https://repositorio.upse.edu.ec/handle/46000/5852
https://repositorio.upse.edu.ec/handle/46000/5853
https://repositorio.upse.edu.ec/handle/46000/5855
https://repositorio.upse.edu.ec/handle/46000/5856
https://repositorio.upse.edu.ec/handle/46000/5857
https://repositorio.upse.edu.ec/handle/46000/5858
https://repositorio.upse.edu.ec/handle/46000/5859
https://repositorio.upse.edu.ec/handle/46000/5867
https://repositorio.upse.edu.ec/handle/46000/5860
https://repositorio.upse.edu.ec/handle/46000/5861
https://repositorio.upse.edu.ec/handle/46000/5862
https://repositorio.upse.edu.ec/handle/46000/5865
https://repositorio.upse.edu.ec/handle/46000/5883
https://repositorio.upse.edu.ec/handle/46000/5884
https://repositorio.upse.edu.ec/handle/46000/5885
https://repositorio.upse.edu.ec/handle/46000/5886
https://repositorio.upse.edu.ec/handle/46000/5887
https://repositorio.upse.edu.ec/handle/46000/5888
https://repositorio.upse.edu.ec/handle/46000/5889
https://repositorio.upse.edu.ec/handle/46000/5892
https://repositorio.upse.edu.ec/handle/46000/5896
https://repositorio.upse.edu.ec/handle/46000/5863
https://repositorio.upse.edu.ec/handle/46000/5871
https://repositorio.upse.edu.ec/handle/46000/5872
https://repositorio.upse.edu.ec/handle/46000/5874
https://repositorio.upse.edu.ec/handle/46000/5875
https://repositorio.upse.edu.ec/handle/46000/5876
https://repositorio.upse.edu.ec/handle/46000/5899
https://repositorio.upse.edu.ec/handle/46000/5900
https://repositorio.upse.edu.ec/handle/46000/5864
https://repositorio.upse.edu.ec/handle/46000/5866
https://repositorio.upse.edu.ec/handle/46000/5868
https://repositorio.upse.edu.ec/handle/46000/5869
https://repositorio.upse.edu.ec/handle/46000/5870
https://repositorio.upse.edu.ec/handle/46000/5877
https://repositorio.upse.edu.ec/handle/46000/5878
https://repositorio.upse.edu.ec/handle/46000/5879
https://repositorio.upse.edu.ec/handle/46000/5880
https://repositorio.upse.edu.ec/handle/46000/5881
https://repositorio.upse.edu.ec/handle/46000/5893
https://repositorio.upse.edu.ec/handle/46000/5894
https://repositorio.upse.edu.ec/handle/46000/5895
https://repositorio.upse.edu.ec/handle/46000/5897
https://repositorio.upse.edu.ec/handle/46000/5898
https://repositorio.upse.edu.ec/handle/46000/5902
https://repositorio.upse.edu.ec/handle/46000/5908
https://repositorio.upse.edu.ec/handle/46000/5909
https://repositorio.upse.edu.ec/handle/46000/5873
https://repositorio.upse.edu.ec/handle/46000/5882
https://repositorio.upse.edu.ec/handle/46000/5890
https://repositorio.upse.edu.ec/handle/46000/5891
https://repositorio.upse.edu.ec/handle/46000/5905
https://repositorio.upse.edu.ec/handle/46000/5906
https://repositorio.upse.edu.ec/handle/46000/5907
https://repositorio.upse.edu.ec/handle/46000/5901
https://repositorio.upse.edu.ec/handle/46000/5903
https://repositorio.upse.edu.ec/handle/46000/5904
https://repositorio.upse.edu.ec/handle/46000/5910
https://repositorio.upse.edu.ec/handle/46000/5911
https://repositorio.upse.edu.ec/handle/46000/5912
https://repositorio.upse.edu.ec/handle/46000/5913
https://repositorio.upse.edu.ec/handle/46000/5914
https://repositorio.upse.edu.ec/handle/46000/5915
https://repositorio.upse.edu.ec/handle/46000/5916
https://repositorio.upse.edu.ec/handle/46000/5917
https://repositorio.upse.edu.ec/handle/46000/5918
https://repositorio.upse.edu.ec/handle/46000/5922
https://repositorio.upse.edu.ec/handle/46000/5920
https://repositorio.upse.edu.ec/handle/46000/5923
https://repositorio.upse.edu.ec/handle/46000/5921
https://repositorio.upse.edu.ec/handle/46000/5924
https://repositorio.upse.edu.ec/handle/46000/5925
https://repositorio.upse.edu.ec/handle/46000/5926
https://repositorio.upse.edu.ec/handle/46000/5932
https://repositorio.upse.edu.ec/handle/46000/5933
https://repositorio.upse.edu.ec/handle/46000/5934
https://repositorio.upse.edu.ec/handle/46000/5935
https://repositorio.upse.edu.ec/handle/46000/5936
https://repositorio.upse.edu.ec/handle/46000/5937
https://repositorio.upse.edu.ec/handle/46000/5938
https://repositorio.upse.edu.ec/handle/46000/5939
https://repositorio.upse.edu.ec/handle/46000/5940
https://repositorio.upse.edu.ec/handle/46000/5942
https://repositorio.upse.edu.ec/handle/46000/5945
https://repositorio.upse.edu.ec/handle/46000/5946
https://repositorio.upse.edu.ec/handle/46000/5947
https://repositorio.upse.edu.ec/handle/46000/5951
https://repositorio.upse.edu.ec/handle/46000/5953
https://repositorio.upse.edu.ec/handle/46000/5954
https://repositorio.upse.edu.ec/handle/46000/5961
https://repositorio.upse.edu.ec/handle/46000/5990
https://repositorio.upse.edu.ec/handle/46000/5981
https://repositorio.upse.edu.ec/handle/46000/5998
https://repositorio.upse.edu.ec/handle/46000/5999
https://repositorio.upse.edu.ec/handle/46000/6003
https://repositorio.upse.edu.ec/handle/46000/6031
https://repositorio.upse.edu.ec/handle/46000/6032
https://repositorio.upse.edu.ec/handle/46000/6037
https://repositorio.upse.edu.ec/handle/46000/6038
https://repositorio.upse.edu.ec/handle/46000/6039
https://repositorio.upse.edu.ec/handle/46000/6040
https://repositorio.upse.edu.ec/handle/46000/6042
https://repositorio.upse.edu.ec/handle/46000/6046
https://repositorio.upse.edu.ec/handle/46000/6050
https://repositorio.upse.edu.ec/handle/46000/5941
https://repositorio.upse.edu.ec/handle/46000/5943
https://repositorio.upse.edu.ec/handle/46000/5944
https://repositorio.upse.edu.ec/handle/46000/5950
https://repositorio.upse.edu.ec/handle/46000/5952
https://repositorio.upse.edu.ec/handle/46000/5959
https://repositorio.upse.edu.ec/handle/46000/5970
https://repositorio.upse.edu.ec/handle/46000/5971
https://repositorio.upse.edu.ec/handle/46000/5980
https://repositorio.upse.edu.ec/handle/46000/5989
https://repositorio.upse.edu.ec/handle/46000/5982
https://repositorio.upse.edu.ec/handle/46000/5983
https://repositorio.upse.edu.ec/handle/46000/5984
https://repositorio.upse.edu.ec/handle/46000/5977
https://repositorio.upse.edu.ec/handle/46000/5967
https://repositorio.upse.edu.ec/handle/46000/5994
https://repositorio.upse.edu.ec/handle/46000/5997
https://repositorio.upse.edu.ec/handle/46000/6001
https://repositorio.upse.edu.ec/handle/46000/6004
https://repositorio.upse.edu.ec/handle/46000/5948
https://repositorio.upse.edu.ec/handle/46000/5949
https://repositorio.upse.edu.ec/handle/46000/5955
https://repositorio.upse.edu.ec/handle/46000/5956
https://repositorio.upse.edu.ec/handle/46000/6005
https://repositorio.upse.edu.ec/handle/46000/5957
https://repositorio.upse.edu.ec/handle/46000/5958
https://repositorio.upse.edu.ec/handle/46000/5960
https://repositorio.upse.edu.ec/handle/46000/5962
https://repositorio.upse.edu.ec/handle/46000/5963
https://repositorio.upse.edu.ec/handle/46000/5964
https://repositorio.upse.edu.ec/handle/46000/5965
https://repositorio.upse.edu.ec/handle/46000/5966
https://repositorio.upse.edu.ec/handle/46000/5968
https://repositorio.upse.edu.ec/handle/46000/5969
https://repositorio.upse.edu.ec/handle/46000/5974
https://repositorio.upse.edu.ec/handle/46000/5987
https://repositorio.upse.edu.ec/handle/46000/5979
https://repositorio.upse.edu.ec/handle/46000/5988
https://repositorio.upse.edu.ec/handle/46000/5975
https://repositorio.upse.edu.ec/handle/46000/5976
https://repositorio.upse.edu.ec/handle/46000/5978
https://repositorio.upse.edu.ec/handle/46000/5985
https://repositorio.upse.edu.ec/handle/46000/5986
https://repositorio.upse.edu.ec/handle/46000/5992
https://repositorio.upse.edu.ec/handle/46000/5993
https://repositorio.upse.edu.ec/handle/46000/5996
https://repositorio.upse.edu.ec/handle/46000/6002
https://repositorio.upse.edu.ec/handle/46000/5972
https://repositorio.upse.edu.ec/handle/46000/5973
https://repositorio.upse.edu.ec/handle/46000/5995
https://repositorio.upse.edu.ec/handle/46000/6000
https://repositorio.upse.edu.ec/handle/46000/6018
https://repositorio.upse.edu.ec/handle/46000/6007
https://repositorio.upse.edu.ec/handle/46000/6008
https://repositorio.upse.edu.ec/handle/46000/6019
https://repositorio.upse.edu.ec/handle/46000/6009
https://repositorio.upse.edu.ec/handle/46000/6006
https://repositorio.upse.edu.ec/handle/46000/6020
https://repositorio.upse.edu.ec/handle/46000/6021
https://repositorio.upse.edu.ec/handle/46000/6022
https://repositorio.upse.edu.ec/handle/46000/6012
https://repositorio.upse.edu.ec/handle/46000/6011
https://repositorio.upse.edu.ec/handle/46000/6023
https://repositorio.upse.edu.ec/handle/46000/6024
https://repositorio.upse.edu.ec/handle/46000/6010
https://repositorio.upse.edu.ec/handle/46000/6027
https://repositorio.upse.edu.ec/handle/46000/6025
https://repositorio.upse.edu.ec/handle/46000/6026
https://repositorio.upse.edu.ec/handle/46000/6014
https://repositorio.upse.edu.ec/handle/46000/6028
https://repositorio.upse.edu.ec/handle/46000/6013
https://repositorio.upse.edu.ec/handle/46000/6029
https://repositorio.upse.edu.ec/handle/46000/6030
https://repositorio.upse.edu.ec/handle/46000/6033
https://repositorio.upse.edu.ec/handle/46000/6034
https://repositorio.upse.edu.ec/handle/46000/6036
https://repositorio.upse.edu.ec/handle/46000/6035
https://repositorio.upse.edu.ec/handle/46000/6016
https://repositorio.upse.edu.ec/handle/46000/6049
https://repositorio.upse.edu.ec/handle/46000/6048
https://repositorio.upse.edu.ec/handle/46000/6015
https://repositorio.upse.edu.ec/handle/46000/6052
https://repositorio.upse.edu.ec/handle/46000/6054
https://repositorio.upse.edu.ec/handle/46000/6053