URL List

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
https://repositorio.upse.edu.ec/handle/46000/6062
https://repositorio.upse.edu.ec/handle/46000/6063
https://repositorio.upse.edu.ec/handle/46000/6066
https://repositorio.upse.edu.ec/handle/46000/6065
https://repositorio.upse.edu.ec/handle/46000/6068
https://repositorio.upse.edu.ec/handle/46000/6075
https://repositorio.upse.edu.ec/handle/46000/6041
https://repositorio.upse.edu.ec/handle/46000/6043
https://repositorio.upse.edu.ec/handle/46000/6045
https://repositorio.upse.edu.ec/handle/46000/6017
https://repositorio.upse.edu.ec/handle/46000/6047
https://repositorio.upse.edu.ec/handle/46000/6060
https://repositorio.upse.edu.ec/handle/46000/6061
https://repositorio.upse.edu.ec/handle/46000/6064
https://repositorio.upse.edu.ec/handle/46000/6071
https://repositorio.upse.edu.ec/handle/46000/6070
https://repositorio.upse.edu.ec/handle/46000/6069
https://repositorio.upse.edu.ec/handle/46000/6076
https://repositorio.upse.edu.ec/handle/46000/6077
https://repositorio.upse.edu.ec/handle/46000/6082
https://repositorio.upse.edu.ec/handle/46000/6091
https://repositorio.upse.edu.ec/handle/46000/6090
https://repositorio.upse.edu.ec/handle/46000/6089
https://repositorio.upse.edu.ec/handle/46000/6092
https://repositorio.upse.edu.ec/handle/46000/6102
https://repositorio.upse.edu.ec/handle/46000/6044
https://repositorio.upse.edu.ec/handle/46000/6078
https://repositorio.upse.edu.ec/handle/46000/6051
https://repositorio.upse.edu.ec/handle/46000/6055
https://repositorio.upse.edu.ec/handle/46000/6057
https://repositorio.upse.edu.ec/handle/46000/6058
https://repositorio.upse.edu.ec/handle/46000/6059
https://repositorio.upse.edu.ec/handle/46000/6072
https://repositorio.upse.edu.ec/handle/46000/6067
https://repositorio.upse.edu.ec/handle/46000/6056
https://repositorio.upse.edu.ec/handle/46000/6073
https://repositorio.upse.edu.ec/handle/46000/6074
https://repositorio.upse.edu.ec/handle/46000/6088
https://repositorio.upse.edu.ec/handle/46000/6095
https://repositorio.upse.edu.ec/handle/46000/6099
https://repositorio.upse.edu.ec/handle/46000/6079
https://repositorio.upse.edu.ec/handle/46000/6081
https://repositorio.upse.edu.ec/handle/46000/6080
https://repositorio.upse.edu.ec/handle/46000/6084
https://repositorio.upse.edu.ec/handle/46000/6086
https://repositorio.upse.edu.ec/handle/46000/6083
https://repositorio.upse.edu.ec/handle/46000/6085
https://repositorio.upse.edu.ec/handle/46000/6087
https://repositorio.upse.edu.ec/handle/46000/6093
https://repositorio.upse.edu.ec/handle/46000/6094
https://repositorio.upse.edu.ec/handle/46000/6096
https://repositorio.upse.edu.ec/handle/46000/6097
https://repositorio.upse.edu.ec/handle/46000/6098
https://repositorio.upse.edu.ec/handle/46000/6100
https://repositorio.upse.edu.ec/handle/46000/6101
https://repositorio.upse.edu.ec/handle/46000/6105
https://repositorio.upse.edu.ec/handle/46000/6106
https://repositorio.upse.edu.ec/handle/46000/6107
https://repositorio.upse.edu.ec/handle/46000/6108
https://repositorio.upse.edu.ec/handle/46000/6109
https://repositorio.upse.edu.ec/handle/46000/6110
https://repositorio.upse.edu.ec/handle/46000/6111
https://repositorio.upse.edu.ec/handle/46000/6112
https://repositorio.upse.edu.ec/handle/46000/6113
https://repositorio.upse.edu.ec/handle/46000/6114
https://repositorio.upse.edu.ec/handle/46000/6116
https://repositorio.upse.edu.ec/handle/46000/6115
https://repositorio.upse.edu.ec/handle/46000/6117
https://repositorio.upse.edu.ec/handle/46000/6119
https://repositorio.upse.edu.ec/handle/46000/6118
https://repositorio.upse.edu.ec/handle/46000/6121
https://repositorio.upse.edu.ec/handle/46000/6127
https://repositorio.upse.edu.ec/handle/46000/6120
https://repositorio.upse.edu.ec/handle/46000/6125
https://repositorio.upse.edu.ec/handle/46000/6136
https://repositorio.upse.edu.ec/handle/46000/6138
https://repositorio.upse.edu.ec/handle/46000/6139
https://repositorio.upse.edu.ec/handle/46000/6140
https://repositorio.upse.edu.ec/handle/46000/6144
https://repositorio.upse.edu.ec/handle/46000/6130
https://repositorio.upse.edu.ec/handle/46000/6133
https://repositorio.upse.edu.ec/handle/46000/6123
https://repositorio.upse.edu.ec/handle/46000/6142
https://repositorio.upse.edu.ec/handle/46000/6143
https://repositorio.upse.edu.ec/handle/46000/6124
https://repositorio.upse.edu.ec/handle/46000/6126
https://repositorio.upse.edu.ec/handle/46000/6128
https://repositorio.upse.edu.ec/handle/46000/6129
https://repositorio.upse.edu.ec/handle/46000/6137
https://repositorio.upse.edu.ec/handle/46000/6141
https://repositorio.upse.edu.ec/handle/46000/6145
https://repositorio.upse.edu.ec/handle/46000/6148
https://repositorio.upse.edu.ec/handle/46000/6149
https://repositorio.upse.edu.ec/handle/46000/6150
https://repositorio.upse.edu.ec/handle/46000/6151
https://repositorio.upse.edu.ec/handle/46000/6152
https://repositorio.upse.edu.ec/handle/46000/6153
https://repositorio.upse.edu.ec/handle/46000/6154
https://repositorio.upse.edu.ec/handle/46000/6155
https://repositorio.upse.edu.ec/handle/46000/6156
https://repositorio.upse.edu.ec/handle/46000/6157
https://repositorio.upse.edu.ec/handle/46000/6162
https://repositorio.upse.edu.ec/handle/46000/6161
https://repositorio.upse.edu.ec/handle/46000/6160
https://repositorio.upse.edu.ec/handle/46000/6159
https://repositorio.upse.edu.ec/handle/46000/6158
https://repositorio.upse.edu.ec/handle/46000/6163
https://repositorio.upse.edu.ec/handle/46000/6164
https://repositorio.upse.edu.ec/handle/46000/6165
https://repositorio.upse.edu.ec/handle/46000/6166
https://repositorio.upse.edu.ec/handle/46000/6167
https://repositorio.upse.edu.ec/handle/46000/6168
https://repositorio.upse.edu.ec/handle/46000/6169
https://repositorio.upse.edu.ec/handle/46000/6171
https://repositorio.upse.edu.ec/handle/46000/6172
https://repositorio.upse.edu.ec/handle/46000/6175
https://repositorio.upse.edu.ec/handle/46000/6176
https://repositorio.upse.edu.ec/handle/46000/6180
https://repositorio.upse.edu.ec/handle/46000/6177
https://repositorio.upse.edu.ec/handle/46000/6182
https://repositorio.upse.edu.ec/handle/46000/6170
https://repositorio.upse.edu.ec/handle/46000/6173
https://repositorio.upse.edu.ec/handle/46000/6174
https://repositorio.upse.edu.ec/handle/46000/6178
https://repositorio.upse.edu.ec/handle/46000/6179
https://repositorio.upse.edu.ec/handle/46000/6181
https://repositorio.upse.edu.ec/handle/46000/6183
https://repositorio.upse.edu.ec/handle/46000/6184
https://repositorio.upse.edu.ec/handle/46000/6185
https://repositorio.upse.edu.ec/handle/46000/6187
https://repositorio.upse.edu.ec/handle/46000/6186
https://repositorio.upse.edu.ec/handle/46000/6188
https://repositorio.upse.edu.ec/handle/46000/6189
https://repositorio.upse.edu.ec/handle/46000/6190
https://repositorio.upse.edu.ec/handle/46000/6191
https://repositorio.upse.edu.ec/handle/46000/6192
https://repositorio.upse.edu.ec/handle/46000/6193
https://repositorio.upse.edu.ec/handle/46000/6194
https://repositorio.upse.edu.ec/handle/46000/6195
https://repositorio.upse.edu.ec/handle/46000/6196
https://repositorio.upse.edu.ec/handle/46000/6197
https://repositorio.upse.edu.ec/handle/46000/6198
https://repositorio.upse.edu.ec/handle/46000/6199
https://repositorio.upse.edu.ec/handle/46000/6200
https://repositorio.upse.edu.ec/handle/46000/6201
https://repositorio.upse.edu.ec/handle/46000/6202
https://repositorio.upse.edu.ec/handle/46000/6203
https://repositorio.upse.edu.ec/handle/46000/6206
https://repositorio.upse.edu.ec/handle/46000/6207
https://repositorio.upse.edu.ec/handle/46000/6208
https://repositorio.upse.edu.ec/handle/46000/6209
https://repositorio.upse.edu.ec/handle/46000/6210
https://repositorio.upse.edu.ec/handle/46000/6214
https://repositorio.upse.edu.ec/handle/46000/6211
https://repositorio.upse.edu.ec/handle/46000/6212
https://repositorio.upse.edu.ec/handle/46000/6213
https://repositorio.upse.edu.ec/handle/46000/6216
https://repositorio.upse.edu.ec/handle/46000/6218
https://repositorio.upse.edu.ec/handle/46000/6217
https://repositorio.upse.edu.ec/handle/46000/6220
https://repositorio.upse.edu.ec/handle/46000/6221
https://repositorio.upse.edu.ec/handle/46000/6232
https://repositorio.upse.edu.ec/handle/46000/6219
https://repositorio.upse.edu.ec/handle/46000/6222
https://repositorio.upse.edu.ec/handle/46000/6233
https://repositorio.upse.edu.ec/handle/46000/6223
https://repositorio.upse.edu.ec/handle/46000/6225
https://repositorio.upse.edu.ec/handle/46000/6226
https://repositorio.upse.edu.ec/handle/46000/6224
https://repositorio.upse.edu.ec/handle/46000/6230
https://repositorio.upse.edu.ec/handle/46000/6227
https://repositorio.upse.edu.ec/handle/46000/6228
https://repositorio.upse.edu.ec/handle/46000/6229
https://repositorio.upse.edu.ec/handle/46000/6234
https://repositorio.upse.edu.ec/handle/46000/6264
https://repositorio.upse.edu.ec/handle/46000/6252
https://repositorio.upse.edu.ec/handle/46000/6275
https://repositorio.upse.edu.ec/handle/46000/6272
https://repositorio.upse.edu.ec/handle/46000/6266
https://repositorio.upse.edu.ec/handle/46000/6257
https://repositorio.upse.edu.ec/handle/46000/6251
https://repositorio.upse.edu.ec/handle/46000/6290
https://repositorio.upse.edu.ec/handle/46000/6285
https://repositorio.upse.edu.ec/handle/46000/6246
https://repositorio.upse.edu.ec/handle/46000/6245
https://repositorio.upse.edu.ec/handle/46000/6255
https://repositorio.upse.edu.ec/handle/46000/6263
https://repositorio.upse.edu.ec/handle/46000/6293
https://repositorio.upse.edu.ec/handle/46000/6288
https://repositorio.upse.edu.ec/handle/46000/6287
https://repositorio.upse.edu.ec/handle/46000/6286
https://repositorio.upse.edu.ec/handle/46000/6282
https://repositorio.upse.edu.ec/handle/46000/6281
https://repositorio.upse.edu.ec/handle/46000/6298
https://repositorio.upse.edu.ec/handle/46000/6318
https://repositorio.upse.edu.ec/handle/46000/6322
https://repositorio.upse.edu.ec/handle/46000/6330
https://repositorio.upse.edu.ec/handle/46000/6279
https://repositorio.upse.edu.ec/handle/46000/6303
https://repositorio.upse.edu.ec/handle/46000/6302
https://repositorio.upse.edu.ec/handle/46000/6277
https://repositorio.upse.edu.ec/handle/46000/6276
https://repositorio.upse.edu.ec/handle/46000/6274
https://repositorio.upse.edu.ec/handle/46000/6273
https://repositorio.upse.edu.ec/handle/46000/6271
https://repositorio.upse.edu.ec/handle/46000/6267
https://repositorio.upse.edu.ec/handle/46000/6262
https://repositorio.upse.edu.ec/handle/46000/6260
https://repositorio.upse.edu.ec/handle/46000/6259
https://repositorio.upse.edu.ec/handle/46000/6258
https://repositorio.upse.edu.ec/handle/46000/6256
https://repositorio.upse.edu.ec/handle/46000/6249
https://repositorio.upse.edu.ec/handle/46000/6248
https://repositorio.upse.edu.ec/handle/46000/6278
https://repositorio.upse.edu.ec/handle/46000/6265
https://repositorio.upse.edu.ec/handle/46000/6261
https://repositorio.upse.edu.ec/handle/46000/6244
https://repositorio.upse.edu.ec/handle/46000/6247
https://repositorio.upse.edu.ec/handle/46000/6269
https://repositorio.upse.edu.ec/handle/46000/6268
https://repositorio.upse.edu.ec/handle/46000/6254
https://repositorio.upse.edu.ec/handle/46000/6253
https://repositorio.upse.edu.ec/handle/46000/6250
https://repositorio.upse.edu.ec/handle/46000/6291
https://repositorio.upse.edu.ec/handle/46000/6270
https://repositorio.upse.edu.ec/handle/46000/6292
https://repositorio.upse.edu.ec/handle/46000/6283
https://repositorio.upse.edu.ec/handle/46000/6300
https://repositorio.upse.edu.ec/handle/46000/6289
https://repositorio.upse.edu.ec/handle/46000/6284
https://repositorio.upse.edu.ec/handle/46000/6280
https://repositorio.upse.edu.ec/handle/46000/6306
https://repositorio.upse.edu.ec/handle/46000/6305
https://repositorio.upse.edu.ec/handle/46000/6304
https://repositorio.upse.edu.ec/handle/46000/6301
https://repositorio.upse.edu.ec/handle/46000/6299
https://repositorio.upse.edu.ec/handle/46000/6308
https://repositorio.upse.edu.ec/handle/46000/6296
https://repositorio.upse.edu.ec/handle/46000/6297
https://repositorio.upse.edu.ec/handle/46000/6294
https://repositorio.upse.edu.ec/handle/46000/6295
https://repositorio.upse.edu.ec/handle/46000/6310
https://repositorio.upse.edu.ec/handle/46000/6309
https://repositorio.upse.edu.ec/handle/46000/6316
https://repositorio.upse.edu.ec/handle/46000/6315
https://repositorio.upse.edu.ec/handle/46000/6314
https://repositorio.upse.edu.ec/handle/46000/6313
https://repositorio.upse.edu.ec/handle/46000/6312
https://repositorio.upse.edu.ec/handle/46000/6311
https://repositorio.upse.edu.ec/handle/46000/6319
https://repositorio.upse.edu.ec/handle/46000/6317
https://repositorio.upse.edu.ec/handle/46000/6323
https://repositorio.upse.edu.ec/handle/46000/6320
https://repositorio.upse.edu.ec/handle/46000/6321
https://repositorio.upse.edu.ec/handle/46000/6325
https://repositorio.upse.edu.ec/handle/46000/6324
https://repositorio.upse.edu.ec/handle/46000/6327
https://repositorio.upse.edu.ec/handle/46000/6328
https://repositorio.upse.edu.ec/handle/46000/6333
https://repositorio.upse.edu.ec/handle/46000/6337
https://repositorio.upse.edu.ec/handle/46000/6339
https://repositorio.upse.edu.ec/handle/46000/6336
https://repositorio.upse.edu.ec/handle/46000/6334
https://repositorio.upse.edu.ec/handle/46000/6346
https://repositorio.upse.edu.ec/handle/46000/6326
https://repositorio.upse.edu.ec/handle/46000/6329
https://repositorio.upse.edu.ec/handle/46000/6341
https://repositorio.upse.edu.ec/handle/46000/6340
https://repositorio.upse.edu.ec/handle/46000/6335
https://repositorio.upse.edu.ec/handle/46000/6338
https://repositorio.upse.edu.ec/handle/46000/6343
https://repositorio.upse.edu.ec/handle/46000/6342
https://repositorio.upse.edu.ec/handle/46000/6344
https://repositorio.upse.edu.ec/handle/46000/6347
https://repositorio.upse.edu.ec/handle/46000/6345
https://repositorio.upse.edu.ec/handle/46000/6349
https://repositorio.upse.edu.ec/handle/46000/6348
https://repositorio.upse.edu.ec/handle/46000/6351
https://repositorio.upse.edu.ec/handle/46000/6350
https://repositorio.upse.edu.ec/handle/46000/6352
https://repositorio.upse.edu.ec/handle/46000/6368
https://repositorio.upse.edu.ec/handle/46000/6367
https://repositorio.upse.edu.ec/handle/46000/6366
https://repositorio.upse.edu.ec/handle/46000/6365
https://repositorio.upse.edu.ec/handle/46000/6364
https://repositorio.upse.edu.ec/handle/46000/6363
https://repositorio.upse.edu.ec/handle/46000/6362
https://repositorio.upse.edu.ec/handle/46000/6360
https://repositorio.upse.edu.ec/handle/46000/6361
https://repositorio.upse.edu.ec/handle/46000/6356
https://repositorio.upse.edu.ec/handle/46000/6354
https://repositorio.upse.edu.ec/handle/46000/6384
https://repositorio.upse.edu.ec/handle/46000/6359
https://repositorio.upse.edu.ec/handle/46000/6358
https://repositorio.upse.edu.ec/handle/46000/6357
https://repositorio.upse.edu.ec/handle/46000/6383
https://repositorio.upse.edu.ec/handle/46000/6355
https://repositorio.upse.edu.ec/handle/46000/6353
https://repositorio.upse.edu.ec/handle/46000/6382
https://repositorio.upse.edu.ec/handle/46000/6378
https://repositorio.upse.edu.ec/handle/46000/6381
https://repositorio.upse.edu.ec/handle/46000/6380
https://repositorio.upse.edu.ec/handle/46000/6379
https://repositorio.upse.edu.ec/handle/46000/6377
https://repositorio.upse.edu.ec/handle/46000/6375
https://repositorio.upse.edu.ec/handle/46000/6376
https://repositorio.upse.edu.ec/handle/46000/6374
https://repositorio.upse.edu.ec/handle/46000/6372
https://repositorio.upse.edu.ec/handle/46000/6373
https://repositorio.upse.edu.ec/handle/46000/6371
https://repositorio.upse.edu.ec/handle/46000/6370
https://repositorio.upse.edu.ec/handle/46000/6369
https://repositorio.upse.edu.ec/handle/46000/6385
https://repositorio.upse.edu.ec/handle/46000/6386
https://repositorio.upse.edu.ec/handle/46000/6390
https://repositorio.upse.edu.ec/handle/46000/6396
https://repositorio.upse.edu.ec/handle/46000/6395
https://repositorio.upse.edu.ec/handle/46000/6394
https://repositorio.upse.edu.ec/handle/46000/6392
https://repositorio.upse.edu.ec/handle/46000/6387
https://repositorio.upse.edu.ec/handle/46000/6388
https://repositorio.upse.edu.ec/handle/46000/6389
https://repositorio.upse.edu.ec/handle/46000/6397
https://repositorio.upse.edu.ec/handle/46000/6391
https://repositorio.upse.edu.ec/handle/46000/6398
https://repositorio.upse.edu.ec/handle/46000/6409
https://repositorio.upse.edu.ec/handle/46000/6408
https://repositorio.upse.edu.ec/handle/46000/6405
https://repositorio.upse.edu.ec/handle/46000/6428
https://repositorio.upse.edu.ec/handle/46000/6427
https://repositorio.upse.edu.ec/handle/46000/6412
https://repositorio.upse.edu.ec/handle/46000/6410
https://repositorio.upse.edu.ec/handle/46000/6407
https://repositorio.upse.edu.ec/handle/46000/6406
https://repositorio.upse.edu.ec/handle/46000/6404
https://repositorio.upse.edu.ec/handle/46000/6400
https://repositorio.upse.edu.ec/handle/46000/6416
https://repositorio.upse.edu.ec/handle/46000/6393
https://repositorio.upse.edu.ec/handle/46000/6413
https://repositorio.upse.edu.ec/handle/46000/6411
https://repositorio.upse.edu.ec/handle/46000/6399
https://repositorio.upse.edu.ec/handle/46000/6401
https://repositorio.upse.edu.ec/handle/46000/6403
https://repositorio.upse.edu.ec/handle/46000/6415
https://repositorio.upse.edu.ec/handle/46000/6430
https://repositorio.upse.edu.ec/handle/46000/6426
https://repositorio.upse.edu.ec/handle/46000/6402
https://repositorio.upse.edu.ec/handle/46000/6414
https://repositorio.upse.edu.ec/handle/46000/6420
https://repositorio.upse.edu.ec/handle/46000/6417
https://repositorio.upse.edu.ec/handle/46000/6419
https://repositorio.upse.edu.ec/handle/46000/6418
https://repositorio.upse.edu.ec/handle/46000/6421
https://repositorio.upse.edu.ec/handle/46000/6429
https://repositorio.upse.edu.ec/handle/46000/6425
https://repositorio.upse.edu.ec/handle/46000/6424
https://repositorio.upse.edu.ec/handle/46000/6423
https://repositorio.upse.edu.ec/handle/46000/6422
https://repositorio.upse.edu.ec/handle/46000/6431
https://repositorio.upse.edu.ec/handle/46000/6432
https://repositorio.upse.edu.ec/handle/46000/6443
https://repositorio.upse.edu.ec/handle/46000/6444
https://repositorio.upse.edu.ec/handle/46000/6445
https://repositorio.upse.edu.ec/handle/46000/6446
https://repositorio.upse.edu.ec/handle/46000/6447
https://repositorio.upse.edu.ec/handle/46000/6448
https://repositorio.upse.edu.ec/handle/46000/6450
https://repositorio.upse.edu.ec/handle/46000/6452
https://repositorio.upse.edu.ec/handle/46000/6451
https://repositorio.upse.edu.ec/handle/46000/6456
https://repositorio.upse.edu.ec/handle/46000/6453
https://repositorio.upse.edu.ec/handle/46000/6454
https://repositorio.upse.edu.ec/handle/46000/6461
https://repositorio.upse.edu.ec/handle/46000/6477
https://repositorio.upse.edu.ec/handle/46000/6457
https://repositorio.upse.edu.ec/handle/46000/6466
https://repositorio.upse.edu.ec/handle/46000/6462
https://repositorio.upse.edu.ec/handle/46000/6472
https://repositorio.upse.edu.ec/handle/46000/6455
https://repositorio.upse.edu.ec/handle/46000/6458
https://repositorio.upse.edu.ec/handle/46000/6479
https://repositorio.upse.edu.ec/handle/46000/6439
https://repositorio.upse.edu.ec/handle/46000/6437
https://repositorio.upse.edu.ec/handle/46000/6433
https://repositorio.upse.edu.ec/handle/46000/6435
https://repositorio.upse.edu.ec/handle/46000/6436
https://repositorio.upse.edu.ec/handle/46000/6434
https://repositorio.upse.edu.ec/handle/46000/6460
https://repositorio.upse.edu.ec/handle/46000/6475
https://repositorio.upse.edu.ec/handle/46000/6469
https://repositorio.upse.edu.ec/handle/46000/6473
https://repositorio.upse.edu.ec/handle/46000/6459
https://repositorio.upse.edu.ec/handle/46000/6467
https://repositorio.upse.edu.ec/handle/46000/6465
https://repositorio.upse.edu.ec/handle/46000/6442
https://repositorio.upse.edu.ec/handle/46000/6438
https://repositorio.upse.edu.ec/handle/46000/6441
https://repositorio.upse.edu.ec/handle/46000/6476
https://repositorio.upse.edu.ec/handle/46000/6481
https://repositorio.upse.edu.ec/handle/46000/6490
https://repositorio.upse.edu.ec/handle/46000/6495
https://repositorio.upse.edu.ec/handle/46000/6504
https://repositorio.upse.edu.ec/handle/46000/6468
https://repositorio.upse.edu.ec/handle/46000/6463