URL List

https://repositorio.upse.edu.ec/handle/46000/8135
https://repositorio.upse.edu.ec/handle/46000/8136
https://repositorio.upse.edu.ec/handle/46000/8137
https://repositorio.upse.edu.ec/handle/46000/8138
https://repositorio.upse.edu.ec/handle/46000/8147
https://repositorio.upse.edu.ec/handle/46000/8169
https://repositorio.upse.edu.ec/handle/46000/8174
https://repositorio.upse.edu.ec/handle/46000/8157
https://repositorio.upse.edu.ec/handle/46000/8153
https://repositorio.upse.edu.ec/handle/46000/8155
https://repositorio.upse.edu.ec/handle/46000/8162
https://repositorio.upse.edu.ec/handle/46000/8163
https://repositorio.upse.edu.ec/handle/46000/8164
https://repositorio.upse.edu.ec/handle/46000/8165
https://repositorio.upse.edu.ec/handle/46000/8166
https://repositorio.upse.edu.ec/handle/46000/8167
https://repositorio.upse.edu.ec/handle/46000/8176
https://repositorio.upse.edu.ec/handle/46000/8180
https://repositorio.upse.edu.ec/handle/46000/8181
https://repositorio.upse.edu.ec/handle/46000/8182
https://repositorio.upse.edu.ec/handle/46000/8184
https://repositorio.upse.edu.ec/handle/46000/8201
https://repositorio.upse.edu.ec/handle/46000/8187
https://repositorio.upse.edu.ec/handle/46000/8185
https://repositorio.upse.edu.ec/handle/46000/8202
https://repositorio.upse.edu.ec/handle/46000/8199
https://repositorio.upse.edu.ec/handle/46000/8207
https://repositorio.upse.edu.ec/handle/46000/8206
https://repositorio.upse.edu.ec/handle/46000/8214
https://repositorio.upse.edu.ec/handle/46000/8191
https://repositorio.upse.edu.ec/handle/46000/8188
https://repositorio.upse.edu.ec/handle/46000/8192
https://repositorio.upse.edu.ec/handle/46000/8209
https://repositorio.upse.edu.ec/handle/46000/8210
https://repositorio.upse.edu.ec/handle/46000/8215
https://repositorio.upse.edu.ec/handle/46000/8200
https://repositorio.upse.edu.ec/handle/46000/8216
https://repositorio.upse.edu.ec/handle/46000/8211
https://repositorio.upse.edu.ec/handle/46000/8249
https://repositorio.upse.edu.ec/handle/46000/8250
https://repositorio.upse.edu.ec/handle/46000/8251
https://repositorio.upse.edu.ec/handle/46000/8252
https://repositorio.upse.edu.ec/handle/46000/8253
https://repositorio.upse.edu.ec/handle/46000/8254
https://repositorio.upse.edu.ec/handle/46000/8255
https://repositorio.upse.edu.ec/handle/46000/8256
https://repositorio.upse.edu.ec/handle/46000/8257
https://repositorio.upse.edu.ec/handle/46000/8258
https://repositorio.upse.edu.ec/handle/46000/8259
https://repositorio.upse.edu.ec/handle/46000/8260
https://repositorio.upse.edu.ec/handle/46000/8261
https://repositorio.upse.edu.ec/handle/46000/8262
https://repositorio.upse.edu.ec/handle/46000/8263
https://repositorio.upse.edu.ec/handle/46000/8264
https://repositorio.upse.edu.ec/handle/46000/8265
https://repositorio.upse.edu.ec/handle/46000/8266
https://repositorio.upse.edu.ec/handle/46000/8267
https://repositorio.upse.edu.ec/handle/46000/8268
https://repositorio.upse.edu.ec/handle/46000/8269
https://repositorio.upse.edu.ec/handle/46000/8270
https://repositorio.upse.edu.ec/handle/46000/8271
https://repositorio.upse.edu.ec/handle/46000/8272
https://repositorio.upse.edu.ec/handle/46000/8290
https://repositorio.upse.edu.ec/handle/46000/8295
https://repositorio.upse.edu.ec/handle/46000/8298
https://repositorio.upse.edu.ec/handle/46000/8299
https://repositorio.upse.edu.ec/handle/46000/8325
https://repositorio.upse.edu.ec/handle/46000/8326
https://repositorio.upse.edu.ec/handle/46000/8327
https://repositorio.upse.edu.ec/handle/46000/8329
https://repositorio.upse.edu.ec/handle/46000/8359
https://repositorio.upse.edu.ec/handle/46000/8365
https://repositorio.upse.edu.ec/handle/46000/8381
https://repositorio.upse.edu.ec/handle/46000/8382
https://repositorio.upse.edu.ec/handle/46000/8397
https://repositorio.upse.edu.ec/handle/46000/8414
https://repositorio.upse.edu.ec/handle/46000/8432
https://repositorio.upse.edu.ec/handle/46000/8441
https://repositorio.upse.edu.ec/handle/46000/8438
https://repositorio.upse.edu.ec/handle/46000/8455
https://repositorio.upse.edu.ec/handle/46000/8525
https://repositorio.upse.edu.ec/handle/46000/8291
https://repositorio.upse.edu.ec/handle/46000/8293
https://repositorio.upse.edu.ec/handle/46000/8294
https://repositorio.upse.edu.ec/handle/46000/8321
https://repositorio.upse.edu.ec/handle/46000/8322
https://repositorio.upse.edu.ec/handle/46000/8324
https://repositorio.upse.edu.ec/handle/46000/8344
https://repositorio.upse.edu.ec/handle/46000/8391
https://repositorio.upse.edu.ec/handle/46000/8425
https://repositorio.upse.edu.ec/handle/46000/8396
https://repositorio.upse.edu.ec/handle/46000/8416
https://repositorio.upse.edu.ec/handle/46000/8431
https://repositorio.upse.edu.ec/handle/46000/8433
https://repositorio.upse.edu.ec/handle/46000/8436
https://repositorio.upse.edu.ec/handle/46000/8444
https://repositorio.upse.edu.ec/handle/46000/8546
https://repositorio.upse.edu.ec/handle/46000/8450
https://repositorio.upse.edu.ec/handle/46000/8451
https://repositorio.upse.edu.ec/handle/46000/8531
https://repositorio.upse.edu.ec/handle/46000/8541
https://repositorio.upse.edu.ec/handle/46000/8549
https://repositorio.upse.edu.ec/handle/46000/8467
https://repositorio.upse.edu.ec/handle/46000/8466
https://repositorio.upse.edu.ec/handle/46000/8555
https://repositorio.upse.edu.ec/handle/46000/8559
https://repositorio.upse.edu.ec/handle/46000/8303
https://repositorio.upse.edu.ec/handle/46000/8315
https://repositorio.upse.edu.ec/handle/46000/8316
https://repositorio.upse.edu.ec/handle/46000/8318
https://repositorio.upse.edu.ec/handle/46000/8319
https://repositorio.upse.edu.ec/handle/46000/8323
https://repositorio.upse.edu.ec/handle/46000/8328
https://repositorio.upse.edu.ec/handle/46000/8334
https://repositorio.upse.edu.ec/handle/46000/8340
https://repositorio.upse.edu.ec/handle/46000/8373
https://repositorio.upse.edu.ec/handle/46000/8351
https://repositorio.upse.edu.ec/handle/46000/8406
https://repositorio.upse.edu.ec/handle/46000/8421
https://repositorio.upse.edu.ec/handle/46000/8407
https://repositorio.upse.edu.ec/handle/46000/8412
https://repositorio.upse.edu.ec/handle/46000/8413
https://repositorio.upse.edu.ec/handle/46000/8437
https://repositorio.upse.edu.ec/handle/46000/8544
https://repositorio.upse.edu.ec/handle/46000/8548
https://repositorio.upse.edu.ec/handle/46000/8459
https://repositorio.upse.edu.ec/handle/46000/8461
https://repositorio.upse.edu.ec/handle/46000/8463
https://repositorio.upse.edu.ec/handle/46000/8470
https://repositorio.upse.edu.ec/handle/46000/8292
https://repositorio.upse.edu.ec/handle/46000/8296
https://repositorio.upse.edu.ec/handle/46000/8297
https://repositorio.upse.edu.ec/handle/46000/8300
https://repositorio.upse.edu.ec/handle/46000/8301
https://repositorio.upse.edu.ec/handle/46000/8302
https://repositorio.upse.edu.ec/handle/46000/8304
https://repositorio.upse.edu.ec/handle/46000/8306
https://repositorio.upse.edu.ec/handle/46000/8307
https://repositorio.upse.edu.ec/handle/46000/8309
https://repositorio.upse.edu.ec/handle/46000/8312
https://repositorio.upse.edu.ec/handle/46000/8343
https://repositorio.upse.edu.ec/handle/46000/8374
https://repositorio.upse.edu.ec/handle/46000/8375
https://repositorio.upse.edu.ec/handle/46000/8376
https://repositorio.upse.edu.ec/handle/46000/8350
https://repositorio.upse.edu.ec/handle/46000/8352
https://repositorio.upse.edu.ec/handle/46000/8379
https://repositorio.upse.edu.ec/handle/46000/8355
https://repositorio.upse.edu.ec/handle/46000/8356
https://repositorio.upse.edu.ec/handle/46000/8305
https://repositorio.upse.edu.ec/handle/46000/8308
https://repositorio.upse.edu.ec/handle/46000/8310
https://repositorio.upse.edu.ec/handle/46000/8311
https://repositorio.upse.edu.ec/handle/46000/8313
https://repositorio.upse.edu.ec/handle/46000/8314
https://repositorio.upse.edu.ec/handle/46000/8317
https://repositorio.upse.edu.ec/handle/46000/8320
https://repositorio.upse.edu.ec/handle/46000/8399
https://repositorio.upse.edu.ec/handle/46000/8417
https://repositorio.upse.edu.ec/handle/46000/8418
https://repositorio.upse.edu.ec/handle/46000/8402
https://repositorio.upse.edu.ec/handle/46000/8404
https://repositorio.upse.edu.ec/handle/46000/8410
https://repositorio.upse.edu.ec/handle/46000/8409
https://repositorio.upse.edu.ec/handle/46000/8411
https://repositorio.upse.edu.ec/handle/46000/8330
https://repositorio.upse.edu.ec/handle/46000/8331
https://repositorio.upse.edu.ec/handle/46000/8332
https://repositorio.upse.edu.ec/handle/46000/8333
https://repositorio.upse.edu.ec/handle/46000/8335
https://repositorio.upse.edu.ec/handle/46000/8339
https://repositorio.upse.edu.ec/handle/46000/8368
https://repositorio.upse.edu.ec/handle/46000/8341
https://repositorio.upse.edu.ec/handle/46000/8348
https://repositorio.upse.edu.ec/handle/46000/8349
https://repositorio.upse.edu.ec/handle/46000/8358
https://repositorio.upse.edu.ec/handle/46000/8362
https://repositorio.upse.edu.ec/handle/46000/8366
https://repositorio.upse.edu.ec/handle/46000/8367
https://repositorio.upse.edu.ec/handle/46000/8383
https://repositorio.upse.edu.ec/handle/46000/8389
https://repositorio.upse.edu.ec/handle/46000/8384
https://repositorio.upse.edu.ec/handle/46000/8385
https://repositorio.upse.edu.ec/handle/46000/8390
https://repositorio.upse.edu.ec/handle/46000/8387
https://repositorio.upse.edu.ec/handle/46000/8393
https://repositorio.upse.edu.ec/handle/46000/8394
https://repositorio.upse.edu.ec/handle/46000/8422
https://repositorio.upse.edu.ec/handle/46000/8423
https://repositorio.upse.edu.ec/handle/46000/8424
https://repositorio.upse.edu.ec/handle/46000/8426
https://repositorio.upse.edu.ec/handle/46000/8428
https://repositorio.upse.edu.ec/handle/46000/8429
https://repositorio.upse.edu.ec/handle/46000/8336
https://repositorio.upse.edu.ec/handle/46000/8361
https://repositorio.upse.edu.ec/handle/46000/8363
https://repositorio.upse.edu.ec/handle/46000/8392
https://repositorio.upse.edu.ec/handle/46000/8386
https://repositorio.upse.edu.ec/handle/46000/8427
https://repositorio.upse.edu.ec/handle/46000/8415
https://repositorio.upse.edu.ec/handle/46000/8439
https://repositorio.upse.edu.ec/handle/46000/8445
https://repositorio.upse.edu.ec/handle/46000/8337
https://repositorio.upse.edu.ec/handle/46000/8338
https://repositorio.upse.edu.ec/handle/46000/8346
https://repositorio.upse.edu.ec/handle/46000/8347
https://repositorio.upse.edu.ec/handle/46000/8369
https://repositorio.upse.edu.ec/handle/46000/8342
https://repositorio.upse.edu.ec/handle/46000/8370
https://repositorio.upse.edu.ec/handle/46000/8371
https://repositorio.upse.edu.ec/handle/46000/8372
https://repositorio.upse.edu.ec/handle/46000/8345
https://repositorio.upse.edu.ec/handle/46000/8377
https://repositorio.upse.edu.ec/handle/46000/8378
https://repositorio.upse.edu.ec/handle/46000/8353
https://repositorio.upse.edu.ec/handle/46000/8354
https://repositorio.upse.edu.ec/handle/46000/8380
https://repositorio.upse.edu.ec/handle/46000/8357
https://repositorio.upse.edu.ec/handle/46000/8360
https://repositorio.upse.edu.ec/handle/46000/8364
https://repositorio.upse.edu.ec/handle/46000/8388
https://repositorio.upse.edu.ec/handle/46000/8398
https://repositorio.upse.edu.ec/handle/46000/8400
https://repositorio.upse.edu.ec/handle/46000/8401
https://repositorio.upse.edu.ec/handle/46000/8419
https://repositorio.upse.edu.ec/handle/46000/8420
https://repositorio.upse.edu.ec/handle/46000/8403
https://repositorio.upse.edu.ec/handle/46000/8408
https://repositorio.upse.edu.ec/handle/46000/8405
https://repositorio.upse.edu.ec/handle/46000/8430
https://repositorio.upse.edu.ec/handle/46000/8434
https://repositorio.upse.edu.ec/handle/46000/8395
https://repositorio.upse.edu.ec/handle/46000/8440
https://repositorio.upse.edu.ec/handle/46000/8435
https://repositorio.upse.edu.ec/handle/46000/8443
https://repositorio.upse.edu.ec/handle/46000/8442
https://repositorio.upse.edu.ec/handle/46000/8453
https://repositorio.upse.edu.ec/handle/46000/8526
https://repositorio.upse.edu.ec/handle/46000/8454
https://repositorio.upse.edu.ec/handle/46000/8456
https://repositorio.upse.edu.ec/handle/46000/8452
https://repositorio.upse.edu.ec/handle/46000/8527
https://repositorio.upse.edu.ec/handle/46000/8457
https://repositorio.upse.edu.ec/handle/46000/8536
https://repositorio.upse.edu.ec/handle/46000/8545
https://repositorio.upse.edu.ec/handle/46000/8537
https://repositorio.upse.edu.ec/handle/46000/8520
https://repositorio.upse.edu.ec/handle/46000/8528
https://repositorio.upse.edu.ec/handle/46000/8538
https://repositorio.upse.edu.ec/handle/46000/8521
https://repositorio.upse.edu.ec/handle/46000/8522
https://repositorio.upse.edu.ec/handle/46000/8523
https://repositorio.upse.edu.ec/handle/46000/8529
https://repositorio.upse.edu.ec/handle/46000/8539
https://repositorio.upse.edu.ec/handle/46000/8530
https://repositorio.upse.edu.ec/handle/46000/8524
https://repositorio.upse.edu.ec/handle/46000/8532
https://repositorio.upse.edu.ec/handle/46000/8533
https://repositorio.upse.edu.ec/handle/46000/8534
https://repositorio.upse.edu.ec/handle/46000/8535
https://repositorio.upse.edu.ec/handle/46000/8540
https://repositorio.upse.edu.ec/handle/46000/8542
https://repositorio.upse.edu.ec/handle/46000/8543
https://repositorio.upse.edu.ec/handle/46000/8547
https://repositorio.upse.edu.ec/handle/46000/8458
https://repositorio.upse.edu.ec/handle/46000/8462
https://repositorio.upse.edu.ec/handle/46000/8575
https://repositorio.upse.edu.ec/handle/46000/8578
https://repositorio.upse.edu.ec/handle/46000/8580
https://repositorio.upse.edu.ec/handle/46000/8598
https://repositorio.upse.edu.ec/handle/46000/8600
https://repositorio.upse.edu.ec/handle/46000/8591
https://repositorio.upse.edu.ec/handle/46000/8602
https://repositorio.upse.edu.ec/handle/46000/8603
https://repositorio.upse.edu.ec/handle/46000/8620
https://repositorio.upse.edu.ec/handle/46000/8629
https://repositorio.upse.edu.ec/handle/46000/8630
https://repositorio.upse.edu.ec/handle/46000/8638
https://repositorio.upse.edu.ec/handle/46000/8641
https://repositorio.upse.edu.ec/handle/46000/8642
https://repositorio.upse.edu.ec/handle/46000/8689
https://repositorio.upse.edu.ec/handle/46000/8645
https://repositorio.upse.edu.ec/handle/46000/8660
https://repositorio.upse.edu.ec/handle/46000/8662
https://repositorio.upse.edu.ec/handle/46000/8680
https://repositorio.upse.edu.ec/handle/46000/8690
https://repositorio.upse.edu.ec/handle/46000/8693
https://repositorio.upse.edu.ec/handle/46000/8696
https://repositorio.upse.edu.ec/handle/46000/8551
https://repositorio.upse.edu.ec/handle/46000/8464
https://repositorio.upse.edu.ec/handle/46000/8465
https://repositorio.upse.edu.ec/handle/46000/8460
https://repositorio.upse.edu.ec/handle/46000/8472
https://repositorio.upse.edu.ec/handle/46000/8468
https://repositorio.upse.edu.ec/handle/46000/8469
https://repositorio.upse.edu.ec/handle/46000/8487
https://repositorio.upse.edu.ec/handle/46000/8471
https://repositorio.upse.edu.ec/handle/46000/8497
https://repositorio.upse.edu.ec/handle/46000/8473
https://repositorio.upse.edu.ec/handle/46000/8481
https://repositorio.upse.edu.ec/handle/46000/8560
https://repositorio.upse.edu.ec/handle/46000/8498
https://repositorio.upse.edu.ec/handle/46000/8488
https://repositorio.upse.edu.ec/handle/46000/8499
https://repositorio.upse.edu.ec/handle/46000/8561
https://repositorio.upse.edu.ec/handle/46000/8474
https://repositorio.upse.edu.ec/handle/46000/8500
https://repositorio.upse.edu.ec/handle/46000/8489
https://repositorio.upse.edu.ec/handle/46000/8475
https://repositorio.upse.edu.ec/handle/46000/8482
https://repositorio.upse.edu.ec/handle/46000/8490
https://repositorio.upse.edu.ec/handle/46000/8501
https://repositorio.upse.edu.ec/handle/46000/8562
https://repositorio.upse.edu.ec/handle/46000/8476
https://repositorio.upse.edu.ec/handle/46000/8491
https://repositorio.upse.edu.ec/handle/46000/8492
https://repositorio.upse.edu.ec/handle/46000/8477
https://repositorio.upse.edu.ec/handle/46000/8480
https://repositorio.upse.edu.ec/handle/46000/8478
https://repositorio.upse.edu.ec/handle/46000/8493
https://repositorio.upse.edu.ec/handle/46000/8502
https://repositorio.upse.edu.ec/handle/46000/8495
https://repositorio.upse.edu.ec/handle/46000/8496
https://repositorio.upse.edu.ec/handle/46000/8518
https://repositorio.upse.edu.ec/handle/46000/8564
https://repositorio.upse.edu.ec/handle/46000/8486
https://repositorio.upse.edu.ec/handle/46000/8505
https://repositorio.upse.edu.ec/handle/46000/8506
https://repositorio.upse.edu.ec/handle/46000/8553
https://repositorio.upse.edu.ec/handle/46000/8552
https://repositorio.upse.edu.ec/handle/46000/8554
https://repositorio.upse.edu.ec/handle/46000/8595
https://repositorio.upse.edu.ec/handle/46000/8616
https://repositorio.upse.edu.ec/handle/46000/8617
https://repositorio.upse.edu.ec/handle/46000/8622
https://repositorio.upse.edu.ec/handle/46000/8623
https://repositorio.upse.edu.ec/handle/46000/8624
https://repositorio.upse.edu.ec/handle/46000/8643
https://repositorio.upse.edu.ec/handle/46000/8494
https://repositorio.upse.edu.ec/handle/46000/8510
https://repositorio.upse.edu.ec/handle/46000/8565
https://repositorio.upse.edu.ec/handle/46000/8512
https://repositorio.upse.edu.ec/handle/46000/8511
https://repositorio.upse.edu.ec/handle/46000/8514
https://repositorio.upse.edu.ec/handle/46000/8566
https://repositorio.upse.edu.ec/handle/46000/8611
https://repositorio.upse.edu.ec/handle/46000/8627
https://repositorio.upse.edu.ec/handle/46000/8702
https://repositorio.upse.edu.ec/handle/46000/8483
https://repositorio.upse.edu.ec/handle/46000/8479
https://repositorio.upse.edu.ec/handle/46000/8568
https://repositorio.upse.edu.ec/handle/46000/8571
https://repositorio.upse.edu.ec/handle/46000/8570
https://repositorio.upse.edu.ec/handle/46000/8586
https://repositorio.upse.edu.ec/handle/46000/8599
https://repositorio.upse.edu.ec/handle/46000/8608
https://repositorio.upse.edu.ec/handle/46000/8609
https://repositorio.upse.edu.ec/handle/46000/8613
https://repositorio.upse.edu.ec/handle/46000/8678
https://repositorio.upse.edu.ec/handle/46000/8786
https://repositorio.upse.edu.ec/handle/46000/8664
https://repositorio.upse.edu.ec/handle/46000/8669
https://repositorio.upse.edu.ec/handle/46000/8683
https://repositorio.upse.edu.ec/handle/46000/8670
https://repositorio.upse.edu.ec/handle/46000/8682
https://repositorio.upse.edu.ec/handle/46000/8658
https://repositorio.upse.edu.ec/handle/46000/8671
https://repositorio.upse.edu.ec/handle/46000/8694
https://repositorio.upse.edu.ec/handle/46000/8686
https://repositorio.upse.edu.ec/handle/46000/8503
https://repositorio.upse.edu.ec/handle/46000/8581
https://repositorio.upse.edu.ec/handle/46000/8550
https://repositorio.upse.edu.ec/handle/46000/8557
https://repositorio.upse.edu.ec/handle/46000/8573
https://repositorio.upse.edu.ec/handle/46000/8574
https://repositorio.upse.edu.ec/handle/46000/8640
https://repositorio.upse.edu.ec/handle/46000/8615
https://repositorio.upse.edu.ec/handle/46000/8647
https://repositorio.upse.edu.ec/handle/46000/8648
https://repositorio.upse.edu.ec/handle/46000/8649
https://repositorio.upse.edu.ec/handle/46000/8679
https://repositorio.upse.edu.ec/handle/46000/8656
https://repositorio.upse.edu.ec/handle/46000/8672
https://repositorio.upse.edu.ec/handle/46000/8691
https://repositorio.upse.edu.ec/handle/46000/8692
https://repositorio.upse.edu.ec/handle/46000/8697
https://repositorio.upse.edu.ec/handle/46000/8685
https://repositorio.upse.edu.ec/handle/46000/8687
https://repositorio.upse.edu.ec/handle/46000/8484
https://repositorio.upse.edu.ec/handle/46000/8485
https://repositorio.upse.edu.ec/handle/46000/8504
https://repositorio.upse.edu.ec/handle/46000/8517
https://repositorio.upse.edu.ec/handle/46000/8567
https://repositorio.upse.edu.ec/handle/46000/8569
https://repositorio.upse.edu.ec/handle/46000/8769
https://repositorio.upse.edu.ec/handle/46000/8676
https://repositorio.upse.edu.ec/handle/46000/8659
https://repositorio.upse.edu.ec/handle/46000/8667
https://repositorio.upse.edu.ec/handle/46000/8673
https://repositorio.upse.edu.ec/handle/46000/8703
https://repositorio.upse.edu.ec/handle/46000/8507
https://repositorio.upse.edu.ec/handle/46000/8519
https://repositorio.upse.edu.ec/handle/46000/8509
https://repositorio.upse.edu.ec/handle/46000/8508
https://repositorio.upse.edu.ec/handle/46000/8516
https://repositorio.upse.edu.ec/handle/46000/8515
https://repositorio.upse.edu.ec/handle/46000/8513
https://repositorio.upse.edu.ec/handle/46000/8563
https://repositorio.upse.edu.ec/handle/46000/8556
https://repositorio.upse.edu.ec/handle/46000/8558
https://repositorio.upse.edu.ec/handle/46000/8577
https://repositorio.upse.edu.ec/handle/46000/8576
https://repositorio.upse.edu.ec/handle/46000/8583
https://repositorio.upse.edu.ec/handle/46000/8597