URL List

https://repositorio.upse.edu.ec/handle/46000/9070
https://repositorio.upse.edu.ec/handle/46000/9069
https://repositorio.upse.edu.ec/handle/46000/9071
https://repositorio.upse.edu.ec/handle/46000/9072
https://repositorio.upse.edu.ec/handle/46000/9073
https://repositorio.upse.edu.ec/handle/46000/9074
https://repositorio.upse.edu.ec/handle/46000/9075
https://repositorio.upse.edu.ec/handle/46000/9076
https://repositorio.upse.edu.ec/handle/46000/9077
https://repositorio.upse.edu.ec/handle/46000/9078
https://repositorio.upse.edu.ec/handle/46000/9079
https://repositorio.upse.edu.ec/handle/46000/9080
https://repositorio.upse.edu.ec/handle/46000/9092
https://repositorio.upse.edu.ec/handle/46000/9081
https://repositorio.upse.edu.ec/handle/46000/9097
https://repositorio.upse.edu.ec/handle/46000/9089
https://repositorio.upse.edu.ec/handle/46000/9107
https://repositorio.upse.edu.ec/handle/46000/9109
https://repositorio.upse.edu.ec/handle/46000/9106
https://repositorio.upse.edu.ec/handle/46000/9114
https://repositorio.upse.edu.ec/handle/46000/9148
https://repositorio.upse.edu.ec/handle/46000/9122
https://repositorio.upse.edu.ec/handle/46000/9131
https://repositorio.upse.edu.ec/handle/46000/9161
https://repositorio.upse.edu.ec/handle/46000/9164
https://repositorio.upse.edu.ec/handle/46000/9167
https://repositorio.upse.edu.ec/handle/46000/9171
https://repositorio.upse.edu.ec/handle/46000/9172
https://repositorio.upse.edu.ec/handle/46000/9158
https://repositorio.upse.edu.ec/handle/46000/9174
https://repositorio.upse.edu.ec/handle/46000/9137
https://repositorio.upse.edu.ec/handle/46000/9143
https://repositorio.upse.edu.ec/handle/46000/9141
https://repositorio.upse.edu.ec/handle/46000/9176
https://repositorio.upse.edu.ec/handle/46000/9085
https://repositorio.upse.edu.ec/handle/46000/9093
https://repositorio.upse.edu.ec/handle/46000/9111
https://repositorio.upse.edu.ec/handle/46000/9104
https://repositorio.upse.edu.ec/handle/46000/9147
https://repositorio.upse.edu.ec/handle/46000/9082
https://repositorio.upse.edu.ec/handle/46000/9086
https://repositorio.upse.edu.ec/handle/46000/9088
https://repositorio.upse.edu.ec/handle/46000/9103
https://repositorio.upse.edu.ec/handle/46000/9113
https://repositorio.upse.edu.ec/handle/46000/9110
https://repositorio.upse.edu.ec/handle/46000/9146
https://repositorio.upse.edu.ec/handle/46000/9118
https://repositorio.upse.edu.ec/handle/46000/9134
https://repositorio.upse.edu.ec/handle/46000/9135
https://repositorio.upse.edu.ec/handle/46000/9126
https://repositorio.upse.edu.ec/handle/46000/9136
https://repositorio.upse.edu.ec/handle/46000/9128
https://repositorio.upse.edu.ec/handle/46000/9154
https://repositorio.upse.edu.ec/handle/46000/9168
https://repositorio.upse.edu.ec/handle/46000/9156
https://repositorio.upse.edu.ec/handle/46000/9169
https://repositorio.upse.edu.ec/handle/46000/9159
https://repositorio.upse.edu.ec/handle/46000/9138
https://repositorio.upse.edu.ec/handle/46000/9140
https://repositorio.upse.edu.ec/handle/46000/9160
https://repositorio.upse.edu.ec/handle/46000/9139
https://repositorio.upse.edu.ec/handle/46000/9149
https://repositorio.upse.edu.ec/handle/46000/9180
https://repositorio.upse.edu.ec/handle/46000/9186
https://repositorio.upse.edu.ec/handle/46000/9188
https://repositorio.upse.edu.ec/handle/46000/9083
https://repositorio.upse.edu.ec/handle/46000/9084
https://repositorio.upse.edu.ec/handle/46000/9087
https://repositorio.upse.edu.ec/handle/46000/9095
https://repositorio.upse.edu.ec/handle/46000/9099
https://repositorio.upse.edu.ec/handle/46000/9090
https://repositorio.upse.edu.ec/handle/46000/9094
https://repositorio.upse.edu.ec/handle/46000/9098
https://repositorio.upse.edu.ec/handle/46000/9112
https://repositorio.upse.edu.ec/handle/46000/9115
https://repositorio.upse.edu.ec/handle/46000/9117
https://repositorio.upse.edu.ec/handle/46000/9119
https://repositorio.upse.edu.ec/handle/46000/9121
https://repositorio.upse.edu.ec/handle/46000/9123
https://repositorio.upse.edu.ec/handle/46000/9120
https://repositorio.upse.edu.ec/handle/46000/9125
https://repositorio.upse.edu.ec/handle/46000/9132
https://repositorio.upse.edu.ec/handle/46000/9124
https://repositorio.upse.edu.ec/handle/46000/9133
https://repositorio.upse.edu.ec/handle/46000/9155
https://repositorio.upse.edu.ec/handle/46000/9170
https://repositorio.upse.edu.ec/handle/46000/9173
https://repositorio.upse.edu.ec/handle/46000/9142
https://repositorio.upse.edu.ec/handle/46000/9100
https://repositorio.upse.edu.ec/handle/46000/9101
https://repositorio.upse.edu.ec/handle/46000/9181
https://repositorio.upse.edu.ec/handle/46000/9182
https://repositorio.upse.edu.ec/handle/46000/9185
https://repositorio.upse.edu.ec/handle/46000/9105
https://repositorio.upse.edu.ec/handle/46000/9091
https://repositorio.upse.edu.ec/handle/46000/9116
https://repositorio.upse.edu.ec/handle/46000/9096
https://repositorio.upse.edu.ec/handle/46000/9102
https://repositorio.upse.edu.ec/handle/46000/9108
https://repositorio.upse.edu.ec/handle/46000/9129
https://repositorio.upse.edu.ec/handle/46000/9130
https://repositorio.upse.edu.ec/handle/46000/9152
https://repositorio.upse.edu.ec/handle/46000/9162
https://repositorio.upse.edu.ec/handle/46000/9165
https://repositorio.upse.edu.ec/handle/46000/9163
https://repositorio.upse.edu.ec/handle/46000/9157
https://repositorio.upse.edu.ec/handle/46000/9166
https://repositorio.upse.edu.ec/handle/46000/9144
https://repositorio.upse.edu.ec/handle/46000/9150
https://repositorio.upse.edu.ec/handle/46000/9175
https://repositorio.upse.edu.ec/handle/46000/9184
https://repositorio.upse.edu.ec/handle/46000/9177
https://repositorio.upse.edu.ec/handle/46000/9178
https://repositorio.upse.edu.ec/handle/46000/9127
https://repositorio.upse.edu.ec/handle/46000/9153
https://repositorio.upse.edu.ec/handle/46000/9145
https://repositorio.upse.edu.ec/handle/46000/9151
https://repositorio.upse.edu.ec/handle/46000/9195
https://repositorio.upse.edu.ec/handle/46000/9179
https://repositorio.upse.edu.ec/handle/46000/9183
https://repositorio.upse.edu.ec/handle/46000/9187
https://repositorio.upse.edu.ec/handle/46000/9191
https://repositorio.upse.edu.ec/handle/46000/9192
https://repositorio.upse.edu.ec/handle/46000/9193
https://repositorio.upse.edu.ec/handle/46000/9194
https://repositorio.upse.edu.ec/handle/46000/9200
https://repositorio.upse.edu.ec/handle/46000/9201
https://repositorio.upse.edu.ec/handle/46000/9219
https://repositorio.upse.edu.ec/handle/46000/9202
https://repositorio.upse.edu.ec/handle/46000/9203
https://repositorio.upse.edu.ec/handle/46000/9214
https://repositorio.upse.edu.ec/handle/46000/9204
https://repositorio.upse.edu.ec/handle/46000/9205
https://repositorio.upse.edu.ec/handle/46000/9206
https://repositorio.upse.edu.ec/handle/46000/9196
https://repositorio.upse.edu.ec/handle/46000/9198
https://repositorio.upse.edu.ec/handle/46000/9197
https://repositorio.upse.edu.ec/handle/46000/9199
https://repositorio.upse.edu.ec/handle/46000/9207
https://repositorio.upse.edu.ec/handle/46000/9208
https://repositorio.upse.edu.ec/handle/46000/9209
https://repositorio.upse.edu.ec/handle/46000/9210
https://repositorio.upse.edu.ec/handle/46000/9215
https://repositorio.upse.edu.ec/handle/46000/9216
https://repositorio.upse.edu.ec/handle/46000/9218
https://repositorio.upse.edu.ec/handle/46000/9217
https://repositorio.upse.edu.ec/handle/46000/9220
https://repositorio.upse.edu.ec/handle/46000/9221
https://repositorio.upse.edu.ec/handle/46000/9222
https://repositorio.upse.edu.ec/handle/46000/9223
https://repositorio.upse.edu.ec/handle/46000/9224
https://repositorio.upse.edu.ec/handle/46000/9225
https://repositorio.upse.edu.ec/handle/46000/9226
https://repositorio.upse.edu.ec/handle/46000/9228
https://repositorio.upse.edu.ec/handle/46000/9229
https://repositorio.upse.edu.ec/handle/46000/9230
https://repositorio.upse.edu.ec/handle/46000/9231
https://repositorio.upse.edu.ec/handle/46000/9227
https://repositorio.upse.edu.ec/handle/46000/9232
https://repositorio.upse.edu.ec/handle/46000/9233
https://repositorio.upse.edu.ec/handle/46000/9234
https://repositorio.upse.edu.ec/handle/46000/9241
https://repositorio.upse.edu.ec/handle/46000/9235
https://repositorio.upse.edu.ec/handle/46000/9236
https://repositorio.upse.edu.ec/handle/46000/9240
https://repositorio.upse.edu.ec/handle/46000/9237
https://repositorio.upse.edu.ec/handle/46000/9238
https://repositorio.upse.edu.ec/handle/46000/9239
https://repositorio.upse.edu.ec/handle/46000/9242
https://repositorio.upse.edu.ec/handle/46000/9243
https://repositorio.upse.edu.ec/handle/46000/9244
https://repositorio.upse.edu.ec/handle/46000/9256
https://repositorio.upse.edu.ec/handle/46000/9245
https://repositorio.upse.edu.ec/handle/46000/9255
https://repositorio.upse.edu.ec/handle/46000/9276
https://repositorio.upse.edu.ec/handle/46000/9264
https://repositorio.upse.edu.ec/handle/46000/9267
https://repositorio.upse.edu.ec/handle/46000/9269
https://repositorio.upse.edu.ec/handle/46000/9278
https://repositorio.upse.edu.ec/handle/46000/9250
https://repositorio.upse.edu.ec/handle/46000/9257
https://repositorio.upse.edu.ec/handle/46000/9261
https://repositorio.upse.edu.ec/handle/46000/9263
https://repositorio.upse.edu.ec/handle/46000/9272
https://repositorio.upse.edu.ec/handle/46000/9274
https://repositorio.upse.edu.ec/handle/46000/9246
https://repositorio.upse.edu.ec/handle/46000/9249
https://repositorio.upse.edu.ec/handle/46000/9253
https://repositorio.upse.edu.ec/handle/46000/9247
https://repositorio.upse.edu.ec/handle/46000/9248
https://repositorio.upse.edu.ec/handle/46000/9254
https://repositorio.upse.edu.ec/handle/46000/9265
https://repositorio.upse.edu.ec/handle/46000/9262
https://repositorio.upse.edu.ec/handle/46000/9273
https://repositorio.upse.edu.ec/handle/46000/9279
https://repositorio.upse.edu.ec/handle/46000/9251
https://repositorio.upse.edu.ec/handle/46000/9252
https://repositorio.upse.edu.ec/handle/46000/9259
https://repositorio.upse.edu.ec/handle/46000/9266
https://repositorio.upse.edu.ec/handle/46000/9268
https://repositorio.upse.edu.ec/handle/46000/9270
https://repositorio.upse.edu.ec/handle/46000/9260
https://repositorio.upse.edu.ec/handle/46000/9258
https://repositorio.upse.edu.ec/handle/46000/9271
https://repositorio.upse.edu.ec/handle/46000/9275
https://repositorio.upse.edu.ec/handle/46000/9277
https://repositorio.upse.edu.ec/handle/46000/9280
https://repositorio.upse.edu.ec/handle/46000/9283
https://repositorio.upse.edu.ec/handle/46000/9284
https://repositorio.upse.edu.ec/handle/46000/9281
https://repositorio.upse.edu.ec/handle/46000/9282
https://repositorio.upse.edu.ec/handle/46000/9285
https://repositorio.upse.edu.ec/handle/46000/9286
https://repositorio.upse.edu.ec/handle/46000/9287
https://repositorio.upse.edu.ec/handle/46000/9288
https://repositorio.upse.edu.ec/handle/46000/9289
https://repositorio.upse.edu.ec/handle/46000/9290
https://repositorio.upse.edu.ec/handle/46000/9291
https://repositorio.upse.edu.ec/handle/46000/9292
https://repositorio.upse.edu.ec/handle/46000/9293
https://repositorio.upse.edu.ec/handle/46000/9294
https://repositorio.upse.edu.ec/handle/46000/9295
https://repositorio.upse.edu.ec/handle/46000/9321
https://repositorio.upse.edu.ec/handle/46000/9315
https://repositorio.upse.edu.ec/handle/46000/9331
https://repositorio.upse.edu.ec/handle/46000/9334
https://repositorio.upse.edu.ec/handle/46000/9355
https://repositorio.upse.edu.ec/handle/46000/9371
https://repositorio.upse.edu.ec/handle/46000/9369
https://repositorio.upse.edu.ec/handle/46000/9377
https://repositorio.upse.edu.ec/handle/46000/9299
https://repositorio.upse.edu.ec/handle/46000/9302
https://repositorio.upse.edu.ec/handle/46000/9304
https://repositorio.upse.edu.ec/handle/46000/9305
https://repositorio.upse.edu.ec/handle/46000/9317
https://repositorio.upse.edu.ec/handle/46000/9325
https://repositorio.upse.edu.ec/handle/46000/9318
https://repositorio.upse.edu.ec/handle/46000/9333
https://repositorio.upse.edu.ec/handle/46000/9342
https://repositorio.upse.edu.ec/handle/46000/9343
https://repositorio.upse.edu.ec/handle/46000/9353
https://repositorio.upse.edu.ec/handle/46000/9356
https://repositorio.upse.edu.ec/handle/46000/9357
https://repositorio.upse.edu.ec/handle/46000/9361
https://repositorio.upse.edu.ec/handle/46000/9372
https://repositorio.upse.edu.ec/handle/46000/9374
https://repositorio.upse.edu.ec/handle/46000/9451
https://repositorio.upse.edu.ec/handle/46000/9296
https://repositorio.upse.edu.ec/handle/46000/9314
https://repositorio.upse.edu.ec/handle/46000/9306
https://repositorio.upse.edu.ec/handle/46000/9312
https://repositorio.upse.edu.ec/handle/46000/9323
https://repositorio.upse.edu.ec/handle/46000/9335
https://repositorio.upse.edu.ec/handle/46000/9348
https://repositorio.upse.edu.ec/handle/46000/9350
https://repositorio.upse.edu.ec/handle/46000/9368
https://repositorio.upse.edu.ec/handle/46000/9301
https://repositorio.upse.edu.ec/handle/46000/9300
https://repositorio.upse.edu.ec/handle/46000/9297
https://repositorio.upse.edu.ec/handle/46000/9298
https://repositorio.upse.edu.ec/handle/46000/9309
https://repositorio.upse.edu.ec/handle/46000/9328
https://repositorio.upse.edu.ec/handle/46000/9349
https://repositorio.upse.edu.ec/handle/46000/9351
https://repositorio.upse.edu.ec/handle/46000/9359
https://repositorio.upse.edu.ec/handle/46000/9363
https://repositorio.upse.edu.ec/handle/46000/9380
https://repositorio.upse.edu.ec/handle/46000/9307
https://repositorio.upse.edu.ec/handle/46000/9303
https://repositorio.upse.edu.ec/handle/46000/9311
https://repositorio.upse.edu.ec/handle/46000/9320
https://repositorio.upse.edu.ec/handle/46000/9310
https://repositorio.upse.edu.ec/handle/46000/9316
https://repositorio.upse.edu.ec/handle/46000/9319
https://repositorio.upse.edu.ec/handle/46000/9324
https://repositorio.upse.edu.ec/handle/46000/9326
https://repositorio.upse.edu.ec/handle/46000/9327
https://repositorio.upse.edu.ec/handle/46000/9329
https://repositorio.upse.edu.ec/handle/46000/9336
https://repositorio.upse.edu.ec/handle/46000/9337
https://repositorio.upse.edu.ec/handle/46000/9341
https://repositorio.upse.edu.ec/handle/46000/9344
https://repositorio.upse.edu.ec/handle/46000/9345
https://repositorio.upse.edu.ec/handle/46000/9354
https://repositorio.upse.edu.ec/handle/46000/9358
https://repositorio.upse.edu.ec/handle/46000/9360
https://repositorio.upse.edu.ec/handle/46000/9365
https://repositorio.upse.edu.ec/handle/46000/9370
https://repositorio.upse.edu.ec/handle/46000/9373
https://repositorio.upse.edu.ec/handle/46000/9313
https://repositorio.upse.edu.ec/handle/46000/9322
https://repositorio.upse.edu.ec/handle/46000/9308
https://repositorio.upse.edu.ec/handle/46000/9332
https://repositorio.upse.edu.ec/handle/46000/9330
https://repositorio.upse.edu.ec/handle/46000/9338
https://repositorio.upse.edu.ec/handle/46000/9340
https://repositorio.upse.edu.ec/handle/46000/9339
https://repositorio.upse.edu.ec/handle/46000/9346
https://repositorio.upse.edu.ec/handle/46000/9347
https://repositorio.upse.edu.ec/handle/46000/9352
https://repositorio.upse.edu.ec/handle/46000/9364
https://repositorio.upse.edu.ec/handle/46000/9362
https://repositorio.upse.edu.ec/handle/46000/9366
https://repositorio.upse.edu.ec/handle/46000/9367
https://repositorio.upse.edu.ec/handle/46000/9376
https://repositorio.upse.edu.ec/handle/46000/9375
https://repositorio.upse.edu.ec/handle/46000/9378
https://repositorio.upse.edu.ec/handle/46000/9453
https://repositorio.upse.edu.ec/handle/46000/9379
https://repositorio.upse.edu.ec/handle/46000/9381
https://repositorio.upse.edu.ec/handle/46000/9382
https://repositorio.upse.edu.ec/handle/46000/9383
https://repositorio.upse.edu.ec/handle/46000/9384
https://repositorio.upse.edu.ec/handle/46000/9385
https://repositorio.upse.edu.ec/handle/46000/9386
https://repositorio.upse.edu.ec/handle/46000/9387
https://repositorio.upse.edu.ec/handle/46000/9454
https://repositorio.upse.edu.ec/handle/46000/9388
https://repositorio.upse.edu.ec/handle/46000/9390
https://repositorio.upse.edu.ec/handle/46000/9391
https://repositorio.upse.edu.ec/handle/46000/9392
https://repositorio.upse.edu.ec/handle/46000/9393
https://repositorio.upse.edu.ec/handle/46000/9611
https://repositorio.upse.edu.ec/handle/46000/9394
https://repositorio.upse.edu.ec/handle/46000/9389
https://repositorio.upse.edu.ec/handle/46000/9395
https://repositorio.upse.edu.ec/handle/46000/9396
https://repositorio.upse.edu.ec/handle/46000/9398
https://repositorio.upse.edu.ec/handle/46000/9399
https://repositorio.upse.edu.ec/handle/46000/9397
https://repositorio.upse.edu.ec/handle/46000/9610
https://repositorio.upse.edu.ec/handle/46000/9405
https://repositorio.upse.edu.ec/handle/46000/9403
https://repositorio.upse.edu.ec/handle/46000/9400
https://repositorio.upse.edu.ec/handle/46000/9421
https://repositorio.upse.edu.ec/handle/46000/9424
https://repositorio.upse.edu.ec/handle/46000/9433
https://repositorio.upse.edu.ec/handle/46000/9441
https://repositorio.upse.edu.ec/handle/46000/9440
https://repositorio.upse.edu.ec/handle/46000/9439
https://repositorio.upse.edu.ec/handle/46000/9452
https://repositorio.upse.edu.ec/handle/46000/9458
https://repositorio.upse.edu.ec/handle/46000/9463
https://repositorio.upse.edu.ec/handle/46000/9470
https://repositorio.upse.edu.ec/handle/46000/9464
https://repositorio.upse.edu.ec/handle/46000/9465
https://repositorio.upse.edu.ec/handle/46000/9468
https://repositorio.upse.edu.ec/handle/46000/9485
https://repositorio.upse.edu.ec/handle/46000/9491
https://repositorio.upse.edu.ec/handle/46000/9489
https://repositorio.upse.edu.ec/handle/46000/9492
https://repositorio.upse.edu.ec/handle/46000/9570
https://repositorio.upse.edu.ec/handle/46000/9506
https://repositorio.upse.edu.ec/handle/46000/9503
https://repositorio.upse.edu.ec/handle/46000/9499
https://repositorio.upse.edu.ec/handle/46000/9498
https://repositorio.upse.edu.ec/handle/46000/9513
https://repositorio.upse.edu.ec/handle/46000/9404
https://repositorio.upse.edu.ec/handle/46000/9402
https://repositorio.upse.edu.ec/handle/46000/9401
https://repositorio.upse.edu.ec/handle/46000/9414
https://repositorio.upse.edu.ec/handle/46000/9490
https://repositorio.upse.edu.ec/handle/46000/9495
https://repositorio.upse.edu.ec/handle/46000/9533
https://repositorio.upse.edu.ec/handle/46000/9496
https://repositorio.upse.edu.ec/handle/46000/9505
https://repositorio.upse.edu.ec/handle/46000/9504
https://repositorio.upse.edu.ec/handle/46000/9502
https://repositorio.upse.edu.ec/handle/46000/9500
https://repositorio.upse.edu.ec/handle/46000/9409
https://repositorio.upse.edu.ec/handle/46000/9413
https://repositorio.upse.edu.ec/handle/46000/9419
https://repositorio.upse.edu.ec/handle/46000/9415
https://repositorio.upse.edu.ec/handle/46000/9417
https://repositorio.upse.edu.ec/handle/46000/9423
https://repositorio.upse.edu.ec/handle/46000/9450
https://repositorio.upse.edu.ec/handle/46000/9540
https://repositorio.upse.edu.ec/handle/46000/9482
https://repositorio.upse.edu.ec/handle/46000/9455
https://repositorio.upse.edu.ec/handle/46000/9411
https://repositorio.upse.edu.ec/handle/46000/9416
https://repositorio.upse.edu.ec/handle/46000/9448
https://repositorio.upse.edu.ec/handle/46000/9444
https://repositorio.upse.edu.ec/handle/46000/9443
https://repositorio.upse.edu.ec/handle/46000/9432
https://repositorio.upse.edu.ec/handle/46000/9532
https://repositorio.upse.edu.ec/handle/46000/9484
https://repositorio.upse.edu.ec/handle/46000/9541
https://repositorio.upse.edu.ec/handle/46000/9550
https://repositorio.upse.edu.ec/handle/46000/9479
https://repositorio.upse.edu.ec/handle/46000/9536
https://repositorio.upse.edu.ec/handle/46000/9515
https://repositorio.upse.edu.ec/handle/46000/9516
https://repositorio.upse.edu.ec/handle/46000/9521
https://repositorio.upse.edu.ec/handle/46000/9523
https://repositorio.upse.edu.ec/handle/46000/9529
https://repositorio.upse.edu.ec/handle/46000/9528
https://repositorio.upse.edu.ec/handle/46000/9408
https://repositorio.upse.edu.ec/handle/46000/9407
https://repositorio.upse.edu.ec/handle/46000/9542
https://repositorio.upse.edu.ec/handle/46000/9476
https://repositorio.upse.edu.ec/handle/46000/9478
https://repositorio.upse.edu.ec/handle/46000/9422
https://repositorio.upse.edu.ec/handle/46000/9418
https://repositorio.upse.edu.ec/handle/46000/9428
https://repositorio.upse.edu.ec/handle/46000/9461
https://repositorio.upse.edu.ec/handle/46000/9462
https://repositorio.upse.edu.ec/handle/46000/9475
https://repositorio.upse.edu.ec/handle/46000/9477
https://repositorio.upse.edu.ec/handle/46000/9543
https://repositorio.upse.edu.ec/handle/46000/9544
https://repositorio.upse.edu.ec/handle/46000/9480
https://repositorio.upse.edu.ec/handle/46000/9486
https://repositorio.upse.edu.ec/handle/46000/9406