URL List

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
https://repositorio.upse.edu.ec/handle/46000/8278
https://repositorio.upse.edu.ec/handle/46000/7780
https://repositorio.upse.edu.ec/handle/46000/8281
https://repositorio.upse.edu.ec/handle/46000/7638
https://repositorio.upse.edu.ec/handle/46000/7640
https://repositorio.upse.edu.ec/handle/46000/7702
https://repositorio.upse.edu.ec/handle/46000/7706
https://repositorio.upse.edu.ec/handle/46000/7717
https://repositorio.upse.edu.ec/handle/46000/7845
https://repositorio.upse.edu.ec/handle/46000/7793
https://repositorio.upse.edu.ec/handle/46000/7624
https://repositorio.upse.edu.ec/handle/46000/7794
https://repositorio.upse.edu.ec/handle/46000/7797
https://repositorio.upse.edu.ec/handle/46000/8273
https://repositorio.upse.edu.ec/handle/46000/8277
https://repositorio.upse.edu.ec/handle/46000/7802
https://repositorio.upse.edu.ec/handle/46000/8279
https://repositorio.upse.edu.ec/handle/46000/7805
https://repositorio.upse.edu.ec/handle/46000/7755
https://repositorio.upse.edu.ec/handle/46000/7803
https://repositorio.upse.edu.ec/handle/46000/7801
https://repositorio.upse.edu.ec/handle/46000/7804
https://repositorio.upse.edu.ec/handle/46000/7826
https://repositorio.upse.edu.ec/handle/46000/7647
https://repositorio.upse.edu.ec/handle/46000/7643
https://repositorio.upse.edu.ec/handle/46000/7703
https://repositorio.upse.edu.ec/handle/46000/7699
https://repositorio.upse.edu.ec/handle/46000/7716
https://repositorio.upse.edu.ec/handle/46000/7718
https://repositorio.upse.edu.ec/handle/46000/7722
https://repositorio.upse.edu.ec/handle/46000/7719
https://repositorio.upse.edu.ec/handle/46000/7720
https://repositorio.upse.edu.ec/handle/46000/7726
https://repositorio.upse.edu.ec/handle/46000/7732
https://repositorio.upse.edu.ec/handle/46000/7833
https://repositorio.upse.edu.ec/handle/46000/7834
https://repositorio.upse.edu.ec/handle/46000/7836
https://repositorio.upse.edu.ec/handle/46000/7837
https://repositorio.upse.edu.ec/handle/46000/7838
https://repositorio.upse.edu.ec/handle/46000/7840
https://repositorio.upse.edu.ec/handle/46000/7648
https://repositorio.upse.edu.ec/handle/46000/7649
https://repositorio.upse.edu.ec/handle/46000/7701
https://repositorio.upse.edu.ec/handle/46000/7704
https://repositorio.upse.edu.ec/handle/46000/7734
https://repositorio.upse.edu.ec/handle/46000/7711
https://repositorio.upse.edu.ec/handle/46000/7714
https://repositorio.upse.edu.ec/handle/46000/7715
https://repositorio.upse.edu.ec/handle/46000/7721
https://repositorio.upse.edu.ec/handle/46000/7728
https://repositorio.upse.edu.ec/handle/46000/7725
https://repositorio.upse.edu.ec/handle/46000/7727
https://repositorio.upse.edu.ec/handle/46000/7730
https://repositorio.upse.edu.ec/handle/46000/7731
https://repositorio.upse.edu.ec/handle/46000/7832
https://repositorio.upse.edu.ec/handle/46000/7835
https://repositorio.upse.edu.ec/handle/46000/7839
https://repositorio.upse.edu.ec/handle/46000/7842
https://repositorio.upse.edu.ec/handle/46000/7843
https://repositorio.upse.edu.ec/handle/46000/7844
https://repositorio.upse.edu.ec/handle/46000/7846
https://repositorio.upse.edu.ec/handle/46000/7847
https://repositorio.upse.edu.ec/handle/46000/7848
https://repositorio.upse.edu.ec/handle/46000/7849
https://repositorio.upse.edu.ec/handle/46000/7859
https://repositorio.upse.edu.ec/handle/46000/7863
https://repositorio.upse.edu.ec/handle/46000/7875
https://repositorio.upse.edu.ec/handle/46000/7739
https://repositorio.upse.edu.ec/handle/46000/8285
https://repositorio.upse.edu.ec/handle/46000/8286
https://repositorio.upse.edu.ec/handle/46000/7740
https://repositorio.upse.edu.ec/handle/46000/7883
https://repositorio.upse.edu.ec/handle/46000/7850
https://repositorio.upse.edu.ec/handle/46000/7851
https://repositorio.upse.edu.ec/handle/46000/7852
https://repositorio.upse.edu.ec/handle/46000/7853
https://repositorio.upse.edu.ec/handle/46000/7854
https://repositorio.upse.edu.ec/handle/46000/7855
https://repositorio.upse.edu.ec/handle/46000/7856
https://repositorio.upse.edu.ec/handle/46000/7857
https://repositorio.upse.edu.ec/handle/46000/7858
https://repositorio.upse.edu.ec/handle/46000/7860
https://repositorio.upse.edu.ec/handle/46000/7862
https://repositorio.upse.edu.ec/handle/46000/7864
https://repositorio.upse.edu.ec/handle/46000/7861
https://repositorio.upse.edu.ec/handle/46000/7865
https://repositorio.upse.edu.ec/handle/46000/7866
https://repositorio.upse.edu.ec/handle/46000/7867
https://repositorio.upse.edu.ec/handle/46000/7868
https://repositorio.upse.edu.ec/handle/46000/7869
https://repositorio.upse.edu.ec/handle/46000/7870
https://repositorio.upse.edu.ec/handle/46000/7871
https://repositorio.upse.edu.ec/handle/46000/7872
https://repositorio.upse.edu.ec/handle/46000/7873
https://repositorio.upse.edu.ec/handle/46000/7874
https://repositorio.upse.edu.ec/handle/46000/7876
https://repositorio.upse.edu.ec/handle/46000/7877
https://repositorio.upse.edu.ec/handle/46000/7737
https://repositorio.upse.edu.ec/handle/46000/8282
https://repositorio.upse.edu.ec/handle/46000/8221
https://repositorio.upse.edu.ec/handle/46000/7919
https://repositorio.upse.edu.ec/handle/46000/7922
https://repositorio.upse.edu.ec/handle/46000/7923
https://repositorio.upse.edu.ec/handle/46000/7878
https://repositorio.upse.edu.ec/handle/46000/7905
https://repositorio.upse.edu.ec/handle/46000/7891
https://repositorio.upse.edu.ec/handle/46000/7898
https://repositorio.upse.edu.ec/handle/46000/7906
https://repositorio.upse.edu.ec/handle/46000/7917
https://repositorio.upse.edu.ec/handle/46000/7921
https://repositorio.upse.edu.ec/handle/46000/7879
https://repositorio.upse.edu.ec/handle/46000/7736
https://repositorio.upse.edu.ec/handle/46000/7880
https://repositorio.upse.edu.ec/handle/46000/7738
https://repositorio.upse.edu.ec/handle/46000/8284
https://repositorio.upse.edu.ec/handle/46000/8287
https://repositorio.upse.edu.ec/handle/46000/8289
https://repositorio.upse.edu.ec/handle/46000/8224
https://repositorio.upse.edu.ec/handle/46000/7881
https://repositorio.upse.edu.ec/handle/46000/8219
https://repositorio.upse.edu.ec/handle/46000/7890
https://repositorio.upse.edu.ec/handle/46000/7897
https://repositorio.upse.edu.ec/handle/46000/7912
https://repositorio.upse.edu.ec/handle/46000/7914
https://repositorio.upse.edu.ec/handle/46000/7899
https://repositorio.upse.edu.ec/handle/46000/7900
https://repositorio.upse.edu.ec/handle/46000/7901
https://repositorio.upse.edu.ec/handle/46000/7902
https://repositorio.upse.edu.ec/handle/46000/7903
https://repositorio.upse.edu.ec/handle/46000/7741
https://repositorio.upse.edu.ec/handle/46000/8220
https://repositorio.upse.edu.ec/handle/46000/8222
https://repositorio.upse.edu.ec/handle/46000/8223
https://repositorio.upse.edu.ec/handle/46000/7882
https://repositorio.upse.edu.ec/handle/46000/7885
https://repositorio.upse.edu.ec/handle/46000/7886
https://repositorio.upse.edu.ec/handle/46000/7887
https://repositorio.upse.edu.ec/handle/46000/7888
https://repositorio.upse.edu.ec/handle/46000/7889
https://repositorio.upse.edu.ec/handle/46000/7892
https://repositorio.upse.edu.ec/handle/46000/7893
https://repositorio.upse.edu.ec/handle/46000/7894
https://repositorio.upse.edu.ec/handle/46000/7895
https://repositorio.upse.edu.ec/handle/46000/7907
https://repositorio.upse.edu.ec/handle/46000/7908
https://repositorio.upse.edu.ec/handle/46000/7910
https://repositorio.upse.edu.ec/handle/46000/7911
https://repositorio.upse.edu.ec/handle/46000/7909
https://repositorio.upse.edu.ec/handle/46000/7913
https://repositorio.upse.edu.ec/handle/46000/7896
https://repositorio.upse.edu.ec/handle/46000/7904
https://repositorio.upse.edu.ec/handle/46000/7915
https://repositorio.upse.edu.ec/handle/46000/7916
https://repositorio.upse.edu.ec/handle/46000/7918
https://repositorio.upse.edu.ec/handle/46000/7920
https://repositorio.upse.edu.ec/handle/46000/7944
https://repositorio.upse.edu.ec/handle/46000/7945
https://repositorio.upse.edu.ec/handle/46000/7946
https://repositorio.upse.edu.ec/handle/46000/7947
https://repositorio.upse.edu.ec/handle/46000/7949
https://repositorio.upse.edu.ec/handle/46000/7950
https://repositorio.upse.edu.ec/handle/46000/7951
https://repositorio.upse.edu.ec/handle/46000/7952
https://repositorio.upse.edu.ec/handle/46000/7959
https://repositorio.upse.edu.ec/handle/46000/7954
https://repositorio.upse.edu.ec/handle/46000/7953
https://repositorio.upse.edu.ec/handle/46000/7955
https://repositorio.upse.edu.ec/handle/46000/7956
https://repositorio.upse.edu.ec/handle/46000/7957
https://repositorio.upse.edu.ec/handle/46000/7958
https://repositorio.upse.edu.ec/handle/46000/7960
https://repositorio.upse.edu.ec/handle/46000/8225
https://repositorio.upse.edu.ec/handle/46000/8226
https://repositorio.upse.edu.ec/handle/46000/7962
https://repositorio.upse.edu.ec/handle/46000/8013
https://repositorio.upse.edu.ec/handle/46000/7963
https://repositorio.upse.edu.ec/handle/46000/7982
https://repositorio.upse.edu.ec/handle/46000/7983
https://repositorio.upse.edu.ec/handle/46000/7984
https://repositorio.upse.edu.ec/handle/46000/7985
https://repositorio.upse.edu.ec/handle/46000/8015
https://repositorio.upse.edu.ec/handle/46000/8016
https://repositorio.upse.edu.ec/handle/46000/7976
https://repositorio.upse.edu.ec/handle/46000/8017
https://repositorio.upse.edu.ec/handle/46000/7967
https://repositorio.upse.edu.ec/handle/46000/7997
https://repositorio.upse.edu.ec/handle/46000/7991
https://repositorio.upse.edu.ec/handle/46000/7994
https://repositorio.upse.edu.ec/handle/46000/8004
https://repositorio.upse.edu.ec/handle/46000/8029
https://repositorio.upse.edu.ec/handle/46000/8030
https://repositorio.upse.edu.ec/handle/46000/8008
https://repositorio.upse.edu.ec/handle/46000/7988
https://repositorio.upse.edu.ec/handle/46000/8012
https://repositorio.upse.edu.ec/handle/46000/8031
https://repositorio.upse.edu.ec/handle/46000/8033
https://repositorio.upse.edu.ec/handle/46000/7986
https://repositorio.upse.edu.ec/handle/46000/8020
https://repositorio.upse.edu.ec/handle/46000/7989
https://repositorio.upse.edu.ec/handle/46000/8010
https://repositorio.upse.edu.ec/handle/46000/7969
https://repositorio.upse.edu.ec/handle/46000/7998
https://repositorio.upse.edu.ec/handle/46000/7970
https://repositorio.upse.edu.ec/handle/46000/7978
https://repositorio.upse.edu.ec/handle/46000/7971
https://repositorio.upse.edu.ec/handle/46000/8001
https://repositorio.upse.edu.ec/handle/46000/7980
https://repositorio.upse.edu.ec/handle/46000/7974
https://repositorio.upse.edu.ec/handle/46000/8019
https://repositorio.upse.edu.ec/handle/46000/8021
https://repositorio.upse.edu.ec/handle/46000/7987
https://repositorio.upse.edu.ec/handle/46000/8018
https://repositorio.upse.edu.ec/handle/46000/7977
https://repositorio.upse.edu.ec/handle/46000/7996
https://repositorio.upse.edu.ec/handle/46000/7968
https://repositorio.upse.edu.ec/handle/46000/8002
https://repositorio.upse.edu.ec/handle/46000/8024
https://repositorio.upse.edu.ec/handle/46000/8032
https://repositorio.upse.edu.ec/handle/46000/8034
https://repositorio.upse.edu.ec/handle/46000/7975
https://repositorio.upse.edu.ec/handle/46000/7965
https://repositorio.upse.edu.ec/handle/46000/7990
https://repositorio.upse.edu.ec/handle/46000/7999
https://repositorio.upse.edu.ec/handle/46000/8000
https://repositorio.upse.edu.ec/handle/46000/7979
https://repositorio.upse.edu.ec/handle/46000/7972
https://repositorio.upse.edu.ec/handle/46000/8003
https://repositorio.upse.edu.ec/handle/46000/7964
https://repositorio.upse.edu.ec/handle/46000/7966
https://repositorio.upse.edu.ec/handle/46000/7995
https://repositorio.upse.edu.ec/handle/46000/8009
https://repositorio.upse.edu.ec/handle/46000/7992
https://repositorio.upse.edu.ec/handle/46000/7993
https://repositorio.upse.edu.ec/handle/46000/7973
https://repositorio.upse.edu.ec/handle/46000/7981
https://repositorio.upse.edu.ec/handle/46000/8005
https://repositorio.upse.edu.ec/handle/46000/8006
https://repositorio.upse.edu.ec/handle/46000/8007
https://repositorio.upse.edu.ec/handle/46000/8022
https://repositorio.upse.edu.ec/handle/46000/8023
https://repositorio.upse.edu.ec/handle/46000/8011
https://repositorio.upse.edu.ec/handle/46000/8026
https://repositorio.upse.edu.ec/handle/46000/8028
https://repositorio.upse.edu.ec/handle/46000/8047
https://repositorio.upse.edu.ec/handle/46000/8025
https://repositorio.upse.edu.ec/handle/46000/8027
https://repositorio.upse.edu.ec/handle/46000/8035
https://repositorio.upse.edu.ec/handle/46000/8036
https://repositorio.upse.edu.ec/handle/46000/8037
https://repositorio.upse.edu.ec/handle/46000/8038
https://repositorio.upse.edu.ec/handle/46000/8043
https://repositorio.upse.edu.ec/handle/46000/8039
https://repositorio.upse.edu.ec/handle/46000/8045
https://repositorio.upse.edu.ec/handle/46000/8046
https://repositorio.upse.edu.ec/handle/46000/8044
https://repositorio.upse.edu.ec/handle/46000/8040
https://repositorio.upse.edu.ec/handle/46000/8048
https://repositorio.upse.edu.ec/handle/46000/8049
https://repositorio.upse.edu.ec/handle/46000/8041
https://repositorio.upse.edu.ec/handle/46000/8042
https://repositorio.upse.edu.ec/handle/46000/8050
https://repositorio.upse.edu.ec/handle/46000/8051
https://repositorio.upse.edu.ec/handle/46000/8052
https://repositorio.upse.edu.ec/handle/46000/8053
https://repositorio.upse.edu.ec/handle/46000/8054
https://repositorio.upse.edu.ec/handle/46000/8055
https://repositorio.upse.edu.ec/handle/46000/8122
https://repositorio.upse.edu.ec/handle/46000/8056
https://repositorio.upse.edu.ec/handle/46000/8057
https://repositorio.upse.edu.ec/handle/46000/8058
https://repositorio.upse.edu.ec/handle/46000/8060
https://repositorio.upse.edu.ec/handle/46000/8064
https://repositorio.upse.edu.ec/handle/46000/8063
https://repositorio.upse.edu.ec/handle/46000/8177
https://repositorio.upse.edu.ec/handle/46000/8065
https://repositorio.upse.edu.ec/handle/46000/8067
https://repositorio.upse.edu.ec/handle/46000/8068
https://repositorio.upse.edu.ec/handle/46000/8070
https://repositorio.upse.edu.ec/handle/46000/8071
https://repositorio.upse.edu.ec/handle/46000/8072
https://repositorio.upse.edu.ec/handle/46000/8227
https://repositorio.upse.edu.ec/handle/46000/8229
https://repositorio.upse.edu.ec/handle/46000/8073
https://repositorio.upse.edu.ec/handle/46000/8075
https://repositorio.upse.edu.ec/handle/46000/8074
https://repositorio.upse.edu.ec/handle/46000/8076
https://repositorio.upse.edu.ec/handle/46000/8077
https://repositorio.upse.edu.ec/handle/46000/8081
https://repositorio.upse.edu.ec/handle/46000/8078
https://repositorio.upse.edu.ec/handle/46000/8079
https://repositorio.upse.edu.ec/handle/46000/8085
https://repositorio.upse.edu.ec/handle/46000/8083
https://repositorio.upse.edu.ec/handle/46000/8080
https://repositorio.upse.edu.ec/handle/46000/8086
https://repositorio.upse.edu.ec/handle/46000/8087
https://repositorio.upse.edu.ec/handle/46000/8088
https://repositorio.upse.edu.ec/handle/46000/8228
https://repositorio.upse.edu.ec/handle/46000/8082
https://repositorio.upse.edu.ec/handle/46000/8092
https://repositorio.upse.edu.ec/handle/46000/8100
https://repositorio.upse.edu.ec/handle/46000/8101
https://repositorio.upse.edu.ec/handle/46000/8094
https://repositorio.upse.edu.ec/handle/46000/8095
https://repositorio.upse.edu.ec/handle/46000/8103
https://repositorio.upse.edu.ec/handle/46000/8111
https://repositorio.upse.edu.ec/handle/46000/8096
https://repositorio.upse.edu.ec/handle/46000/8117
https://repositorio.upse.edu.ec/handle/46000/8127
https://repositorio.upse.edu.ec/handle/46000/8237
https://repositorio.upse.edu.ec/handle/46000/8239
https://repositorio.upse.edu.ec/handle/46000/8243
https://repositorio.upse.edu.ec/handle/46000/8232
https://repositorio.upse.edu.ec/handle/46000/8233
https://repositorio.upse.edu.ec/handle/46000/8234
https://repositorio.upse.edu.ec/handle/46000/8160
https://repositorio.upse.edu.ec/handle/46000/8172
https://repositorio.upse.edu.ec/handle/46000/8186
https://repositorio.upse.edu.ec/handle/46000/8193
https://repositorio.upse.edu.ec/handle/46000/8190
https://repositorio.upse.edu.ec/handle/46000/8197
https://repositorio.upse.edu.ec/handle/46000/8198
https://repositorio.upse.edu.ec/handle/46000/8097
https://repositorio.upse.edu.ec/handle/46000/8105
https://repositorio.upse.edu.ec/handle/46000/8106
https://repositorio.upse.edu.ec/handle/46000/8119
https://repositorio.upse.edu.ec/handle/46000/8123
https://repositorio.upse.edu.ec/handle/46000/8128
https://repositorio.upse.edu.ec/handle/46000/8238
https://repositorio.upse.edu.ec/handle/46000/8240
https://repositorio.upse.edu.ec/handle/46000/8231
https://repositorio.upse.edu.ec/handle/46000/8134
https://repositorio.upse.edu.ec/handle/46000/8140
https://repositorio.upse.edu.ec/handle/46000/8144
https://repositorio.upse.edu.ec/handle/46000/8089
https://repositorio.upse.edu.ec/handle/46000/8091
https://repositorio.upse.edu.ec/handle/46000/8098
https://repositorio.upse.edu.ec/handle/46000/8099
https://repositorio.upse.edu.ec/handle/46000/8104
https://repositorio.upse.edu.ec/handle/46000/8112
https://repositorio.upse.edu.ec/handle/46000/8125
https://repositorio.upse.edu.ec/handle/46000/8242
https://repositorio.upse.edu.ec/handle/46000/8142
https://repositorio.upse.edu.ec/handle/46000/8146
https://repositorio.upse.edu.ec/handle/46000/8161
https://repositorio.upse.edu.ec/handle/46000/8170
https://repositorio.upse.edu.ec/handle/46000/8171
https://repositorio.upse.edu.ec/handle/46000/8217
https://repositorio.upse.edu.ec/handle/46000/8113
https://repositorio.upse.edu.ec/handle/46000/8114
https://repositorio.upse.edu.ec/handle/46000/8115
https://repositorio.upse.edu.ec/handle/46000/8116
https://repositorio.upse.edu.ec/handle/46000/8124
https://repositorio.upse.edu.ec/handle/46000/8090
https://repositorio.upse.edu.ec/handle/46000/8084
https://repositorio.upse.edu.ec/handle/46000/8093
https://repositorio.upse.edu.ec/handle/46000/8109
https://repositorio.upse.edu.ec/handle/46000/8102
https://repositorio.upse.edu.ec/handle/46000/8110
https://repositorio.upse.edu.ec/handle/46000/8143
https://repositorio.upse.edu.ec/handle/46000/8152
https://repositorio.upse.edu.ec/handle/46000/8158
https://repositorio.upse.edu.ec/handle/46000/8154
https://repositorio.upse.edu.ec/handle/46000/8159
https://repositorio.upse.edu.ec/handle/46000/8156
https://repositorio.upse.edu.ec/handle/46000/8178
https://repositorio.upse.edu.ec/handle/46000/8203
https://repositorio.upse.edu.ec/handle/46000/8212
https://repositorio.upse.edu.ec/handle/46000/8208
https://repositorio.upse.edu.ec/handle/46000/8107
https://repositorio.upse.edu.ec/handle/46000/8108
https://repositorio.upse.edu.ec/handle/46000/8236
https://repositorio.upse.edu.ec/handle/46000/8131
https://repositorio.upse.edu.ec/handle/46000/8139
https://repositorio.upse.edu.ec/handle/46000/8141
https://repositorio.upse.edu.ec/handle/46000/8145
https://repositorio.upse.edu.ec/handle/46000/8148
https://repositorio.upse.edu.ec/handle/46000/8149
https://repositorio.upse.edu.ec/handle/46000/8150
https://repositorio.upse.edu.ec/handle/46000/8168
https://repositorio.upse.edu.ec/handle/46000/8183
https://repositorio.upse.edu.ec/handle/46000/8194
https://repositorio.upse.edu.ec/handle/46000/8195
https://repositorio.upse.edu.ec/handle/46000/8196
https://repositorio.upse.edu.ec/handle/46000/8213
https://repositorio.upse.edu.ec/handle/46000/8218
https://repositorio.upse.edu.ec/handle/46000/8118
https://repositorio.upse.edu.ec/handle/46000/8126
https://repositorio.upse.edu.ec/handle/46000/8130
https://repositorio.upse.edu.ec/handle/46000/8175
https://repositorio.upse.edu.ec/handle/46000/8204
https://repositorio.upse.edu.ec/handle/46000/8189
https://repositorio.upse.edu.ec/handle/46000/8205
https://repositorio.upse.edu.ec/handle/46000/8151
https://repositorio.upse.edu.ec/handle/46000/8241
https://repositorio.upse.edu.ec/handle/46000/8230
https://repositorio.upse.edu.ec/handle/46000/8244
https://repositorio.upse.edu.ec/handle/46000/8245
https://repositorio.upse.edu.ec/handle/46000/8246
https://repositorio.upse.edu.ec/handle/46000/8235
https://repositorio.upse.edu.ec/handle/46000/8247
https://repositorio.upse.edu.ec/handle/46000/8248
https://repositorio.upse.edu.ec/handle/46000/8129
https://repositorio.upse.edu.ec/handle/46000/8132
https://repositorio.upse.edu.ec/handle/46000/8133