URL List

https://repositorio.upse.edu.ec/handle/46000/4274
https://repositorio.upse.edu.ec/handle/46000/4275
https://repositorio.upse.edu.ec/handle/46000/4276
https://repositorio.upse.edu.ec/handle/46000/4277
https://repositorio.upse.edu.ec/handle/46000/4278
https://repositorio.upse.edu.ec/handle/46000/4279
https://repositorio.upse.edu.ec/handle/46000/4281
https://repositorio.upse.edu.ec/handle/46000/4280
https://repositorio.upse.edu.ec/handle/46000/4282
https://repositorio.upse.edu.ec/handle/46000/4283
https://repositorio.upse.edu.ec/handle/46000/4284
https://repositorio.upse.edu.ec/handle/46000/4285
https://repositorio.upse.edu.ec/handle/46000/4303
https://repositorio.upse.edu.ec/handle/46000/4304
https://repositorio.upse.edu.ec/handle/46000/4331
https://repositorio.upse.edu.ec/handle/46000/4339
https://repositorio.upse.edu.ec/handle/46000/4340
https://repositorio.upse.edu.ec/handle/46000/4401
https://repositorio.upse.edu.ec/handle/46000/4403
https://repositorio.upse.edu.ec/handle/46000/4422
https://repositorio.upse.edu.ec/handle/46000/4427
https://repositorio.upse.edu.ec/handle/46000/4426
https://repositorio.upse.edu.ec/handle/46000/4428
https://repositorio.upse.edu.ec/handle/46000/4429
https://repositorio.upse.edu.ec/handle/46000/4502
https://repositorio.upse.edu.ec/handle/46000/4513
https://repositorio.upse.edu.ec/handle/46000/4622
https://repositorio.upse.edu.ec/handle/46000/4299
https://repositorio.upse.edu.ec/handle/46000/4301
https://repositorio.upse.edu.ec/handle/46000/4302
https://repositorio.upse.edu.ec/handle/46000/4305
https://repositorio.upse.edu.ec/handle/46000/4307
https://repositorio.upse.edu.ec/handle/46000/4310
https://repositorio.upse.edu.ec/handle/46000/4313
https://repositorio.upse.edu.ec/handle/46000/4314
https://repositorio.upse.edu.ec/handle/46000/4315
https://repositorio.upse.edu.ec/handle/46000/4325
https://repositorio.upse.edu.ec/handle/46000/4332
https://repositorio.upse.edu.ec/handle/46000/4333
https://repositorio.upse.edu.ec/handle/46000/4334
https://repositorio.upse.edu.ec/handle/46000/4335
https://repositorio.upse.edu.ec/handle/46000/4336
https://repositorio.upse.edu.ec/handle/46000/4338
https://repositorio.upse.edu.ec/handle/46000/4342
https://repositorio.upse.edu.ec/handle/46000/4343
https://repositorio.upse.edu.ec/handle/46000/4345
https://repositorio.upse.edu.ec/handle/46000/4346
https://repositorio.upse.edu.ec/handle/46000/4347
https://repositorio.upse.edu.ec/handle/46000/4348
https://repositorio.upse.edu.ec/handle/46000/4350
https://repositorio.upse.edu.ec/handle/46000/4349
https://repositorio.upse.edu.ec/handle/46000/4353
https://repositorio.upse.edu.ec/handle/46000/4378
https://repositorio.upse.edu.ec/handle/46000/4380
https://repositorio.upse.edu.ec/handle/46000/4379
https://repositorio.upse.edu.ec/handle/46000/4381
https://repositorio.upse.edu.ec/handle/46000/4382
https://repositorio.upse.edu.ec/handle/46000/4383
https://repositorio.upse.edu.ec/handle/46000/4390
https://repositorio.upse.edu.ec/handle/46000/4389
https://repositorio.upse.edu.ec/handle/46000/4391
https://repositorio.upse.edu.ec/handle/46000/4407
https://repositorio.upse.edu.ec/handle/46000/4411
https://repositorio.upse.edu.ec/handle/46000/4413
https://repositorio.upse.edu.ec/handle/46000/4286
https://repositorio.upse.edu.ec/handle/46000/4287
https://repositorio.upse.edu.ec/handle/46000/4288
https://repositorio.upse.edu.ec/handle/46000/4289
https://repositorio.upse.edu.ec/handle/46000/4290
https://repositorio.upse.edu.ec/handle/46000/4291
https://repositorio.upse.edu.ec/handle/46000/4292
https://repositorio.upse.edu.ec/handle/46000/4295
https://repositorio.upse.edu.ec/handle/46000/4296
https://repositorio.upse.edu.ec/handle/46000/4297
https://repositorio.upse.edu.ec/handle/46000/4298
https://repositorio.upse.edu.ec/handle/46000/4300
https://repositorio.upse.edu.ec/handle/46000/4316
https://repositorio.upse.edu.ec/handle/46000/4317
https://repositorio.upse.edu.ec/handle/46000/4319
https://repositorio.upse.edu.ec/handle/46000/4320
https://repositorio.upse.edu.ec/handle/46000/4321
https://repositorio.upse.edu.ec/handle/46000/4322
https://repositorio.upse.edu.ec/handle/46000/4323
https://repositorio.upse.edu.ec/handle/46000/4326
https://repositorio.upse.edu.ec/handle/46000/4337
https://repositorio.upse.edu.ec/handle/46000/4358
https://repositorio.upse.edu.ec/handle/46000/4364
https://repositorio.upse.edu.ec/handle/46000/4365
https://repositorio.upse.edu.ec/handle/46000/4369
https://repositorio.upse.edu.ec/handle/46000/4370
https://repositorio.upse.edu.ec/handle/46000/4433
https://repositorio.upse.edu.ec/handle/46000/4434
https://repositorio.upse.edu.ec/handle/46000/4438
https://repositorio.upse.edu.ec/handle/46000/4437
https://repositorio.upse.edu.ec/handle/46000/4442
https://repositorio.upse.edu.ec/handle/46000/4451
https://repositorio.upse.edu.ec/handle/46000/4465
https://repositorio.upse.edu.ec/handle/46000/4489
https://repositorio.upse.edu.ec/handle/46000/4492
https://repositorio.upse.edu.ec/handle/46000/4503
https://repositorio.upse.edu.ec/handle/46000/4517
https://repositorio.upse.edu.ec/handle/46000/4523
https://repositorio.upse.edu.ec/handle/46000/4293
https://repositorio.upse.edu.ec/handle/46000/4294
https://repositorio.upse.edu.ec/handle/46000/4309
https://repositorio.upse.edu.ec/handle/46000/4312
https://repositorio.upse.edu.ec/handle/46000/4311
https://repositorio.upse.edu.ec/handle/46000/4361
https://repositorio.upse.edu.ec/handle/46000/4362
https://repositorio.upse.edu.ec/handle/46000/4363
https://repositorio.upse.edu.ec/handle/46000/4374
https://repositorio.upse.edu.ec/handle/46000/4385
https://repositorio.upse.edu.ec/handle/46000/4386
https://repositorio.upse.edu.ec/handle/46000/4387
https://repositorio.upse.edu.ec/handle/46000/4388
https://repositorio.upse.edu.ec/handle/46000/4392
https://repositorio.upse.edu.ec/handle/46000/4394
https://repositorio.upse.edu.ec/handle/46000/4395
https://repositorio.upse.edu.ec/handle/46000/4396
https://repositorio.upse.edu.ec/handle/46000/4397
https://repositorio.upse.edu.ec/handle/46000/4398
https://repositorio.upse.edu.ec/handle/46000/4399
https://repositorio.upse.edu.ec/handle/46000/4400
https://repositorio.upse.edu.ec/handle/46000/4402
https://repositorio.upse.edu.ec/handle/46000/4405
https://repositorio.upse.edu.ec/handle/46000/4406
https://repositorio.upse.edu.ec/handle/46000/4408
https://repositorio.upse.edu.ec/handle/46000/4409
https://repositorio.upse.edu.ec/handle/46000/4416
https://repositorio.upse.edu.ec/handle/46000/4415
https://repositorio.upse.edu.ec/handle/46000/4562
https://repositorio.upse.edu.ec/handle/46000/4563
https://repositorio.upse.edu.ec/handle/46000/4306
https://repositorio.upse.edu.ec/handle/46000/4308
https://repositorio.upse.edu.ec/handle/46000/4324
https://repositorio.upse.edu.ec/handle/46000/4327
https://repositorio.upse.edu.ec/handle/46000/4328
https://repositorio.upse.edu.ec/handle/46000/4329
https://repositorio.upse.edu.ec/handle/46000/4330
https://repositorio.upse.edu.ec/handle/46000/4341
https://repositorio.upse.edu.ec/handle/46000/4344
https://repositorio.upse.edu.ec/handle/46000/4351
https://repositorio.upse.edu.ec/handle/46000/4352
https://repositorio.upse.edu.ec/handle/46000/4354
https://repositorio.upse.edu.ec/handle/46000/4355
https://repositorio.upse.edu.ec/handle/46000/4356
https://repositorio.upse.edu.ec/handle/46000/4359
https://repositorio.upse.edu.ec/handle/46000/4360
https://repositorio.upse.edu.ec/handle/46000/4366
https://repositorio.upse.edu.ec/handle/46000/4367
https://repositorio.upse.edu.ec/handle/46000/4368
https://repositorio.upse.edu.ec/handle/46000/4371
https://repositorio.upse.edu.ec/handle/46000/4372
https://repositorio.upse.edu.ec/handle/46000/4373
https://repositorio.upse.edu.ec/handle/46000/4375
https://repositorio.upse.edu.ec/handle/46000/4376
https://repositorio.upse.edu.ec/handle/46000/4377
https://repositorio.upse.edu.ec/handle/46000/4384
https://repositorio.upse.edu.ec/handle/46000/4393
https://repositorio.upse.edu.ec/handle/46000/4404
https://repositorio.upse.edu.ec/handle/46000/4410
https://repositorio.upse.edu.ec/handle/46000/4412
https://repositorio.upse.edu.ec/handle/46000/4414
https://repositorio.upse.edu.ec/handle/46000/4417
https://repositorio.upse.edu.ec/handle/46000/4418
https://repositorio.upse.edu.ec/handle/46000/4419
https://repositorio.upse.edu.ec/handle/46000/4420
https://repositorio.upse.edu.ec/handle/46000/4456
https://repositorio.upse.edu.ec/handle/46000/4466
https://repositorio.upse.edu.ec/handle/46000/4484
https://repositorio.upse.edu.ec/handle/46000/4486
https://repositorio.upse.edu.ec/handle/46000/4487
https://repositorio.upse.edu.ec/handle/46000/4485
https://repositorio.upse.edu.ec/handle/46000/4488
https://repositorio.upse.edu.ec/handle/46000/4497
https://repositorio.upse.edu.ec/handle/46000/4504
https://repositorio.upse.edu.ec/handle/46000/4505
https://repositorio.upse.edu.ec/handle/46000/4507
https://repositorio.upse.edu.ec/handle/46000/4509
https://repositorio.upse.edu.ec/handle/46000/4516
https://repositorio.upse.edu.ec/handle/46000/4531
https://repositorio.upse.edu.ec/handle/46000/4535
https://repositorio.upse.edu.ec/handle/46000/4543
https://repositorio.upse.edu.ec/handle/46000/4601
https://repositorio.upse.edu.ec/handle/46000/4610
https://repositorio.upse.edu.ec/handle/46000/4613
https://repositorio.upse.edu.ec/handle/46000/4421
https://repositorio.upse.edu.ec/handle/46000/4423
https://repositorio.upse.edu.ec/handle/46000/4424
https://repositorio.upse.edu.ec/handle/46000/4425
https://repositorio.upse.edu.ec/handle/46000/4430
https://repositorio.upse.edu.ec/handle/46000/4467
https://repositorio.upse.edu.ec/handle/46000/4469
https://repositorio.upse.edu.ec/handle/46000/4478
https://repositorio.upse.edu.ec/handle/46000/4481
https://repositorio.upse.edu.ec/handle/46000/4480
https://repositorio.upse.edu.ec/handle/46000/4479
https://repositorio.upse.edu.ec/handle/46000/4482
https://repositorio.upse.edu.ec/handle/46000/4483
https://repositorio.upse.edu.ec/handle/46000/4495
https://repositorio.upse.edu.ec/handle/46000/4496
https://repositorio.upse.edu.ec/handle/46000/4499
https://repositorio.upse.edu.ec/handle/46000/4498
https://repositorio.upse.edu.ec/handle/46000/4501
https://repositorio.upse.edu.ec/handle/46000/4512
https://repositorio.upse.edu.ec/handle/46000/4511
https://repositorio.upse.edu.ec/handle/46000/4518
https://repositorio.upse.edu.ec/handle/46000/4545
https://repositorio.upse.edu.ec/handle/46000/4552
https://repositorio.upse.edu.ec/handle/46000/4544
https://repositorio.upse.edu.ec/handle/46000/4547
https://repositorio.upse.edu.ec/handle/46000/4549
https://repositorio.upse.edu.ec/handle/46000/4550
https://repositorio.upse.edu.ec/handle/46000/4551
https://repositorio.upse.edu.ec/handle/46000/4556
https://repositorio.upse.edu.ec/handle/46000/4557
https://repositorio.upse.edu.ec/handle/46000/4558
https://repositorio.upse.edu.ec/handle/46000/4560
https://repositorio.upse.edu.ec/handle/46000/4561
https://repositorio.upse.edu.ec/handle/46000/4564
https://repositorio.upse.edu.ec/handle/46000/4568
https://repositorio.upse.edu.ec/handle/46000/4597
https://repositorio.upse.edu.ec/handle/46000/4592
https://repositorio.upse.edu.ec/handle/46000/4604
https://repositorio.upse.edu.ec/handle/46000/4431
https://repositorio.upse.edu.ec/handle/46000/4435
https://repositorio.upse.edu.ec/handle/46000/4436
https://repositorio.upse.edu.ec/handle/46000/4448
https://repositorio.upse.edu.ec/handle/46000/4460
https://repositorio.upse.edu.ec/handle/46000/4474
https://repositorio.upse.edu.ec/handle/46000/4477
https://repositorio.upse.edu.ec/handle/46000/4475
https://repositorio.upse.edu.ec/handle/46000/4476
https://repositorio.upse.edu.ec/handle/46000/4494
https://repositorio.upse.edu.ec/handle/46000/4432
https://repositorio.upse.edu.ec/handle/46000/4441
https://repositorio.upse.edu.ec/handle/46000/4449
https://repositorio.upse.edu.ec/handle/46000/4450
https://repositorio.upse.edu.ec/handle/46000/4452
https://repositorio.upse.edu.ec/handle/46000/4458
https://repositorio.upse.edu.ec/handle/46000/4459
https://repositorio.upse.edu.ec/handle/46000/4462
https://repositorio.upse.edu.ec/handle/46000/4461
https://repositorio.upse.edu.ec/handle/46000/4468
https://repositorio.upse.edu.ec/handle/46000/4470
https://repositorio.upse.edu.ec/handle/46000/4471
https://repositorio.upse.edu.ec/handle/46000/4472
https://repositorio.upse.edu.ec/handle/46000/4473
https://repositorio.upse.edu.ec/handle/46000/4515
https://repositorio.upse.edu.ec/handle/46000/4607
https://repositorio.upse.edu.ec/handle/46000/4617
https://repositorio.upse.edu.ec/handle/46000/4618
https://repositorio.upse.edu.ec/handle/46000/4443
https://repositorio.upse.edu.ec/handle/46000/4463
https://repositorio.upse.edu.ec/handle/46000/4464
https://repositorio.upse.edu.ec/handle/46000/4490
https://repositorio.upse.edu.ec/handle/46000/4491
https://repositorio.upse.edu.ec/handle/46000/4493
https://repositorio.upse.edu.ec/handle/46000/4500
https://repositorio.upse.edu.ec/handle/46000/4508
https://repositorio.upse.edu.ec/handle/46000/4510
https://repositorio.upse.edu.ec/handle/46000/4534
https://repositorio.upse.edu.ec/handle/46000/4538
https://repositorio.upse.edu.ec/handle/46000/4539
https://repositorio.upse.edu.ec/handle/46000/4540
https://repositorio.upse.edu.ec/handle/46000/4616
https://repositorio.upse.edu.ec/handle/46000/4621
https://repositorio.upse.edu.ec/handle/46000/4444
https://repositorio.upse.edu.ec/handle/46000/4445
https://repositorio.upse.edu.ec/handle/46000/4446
https://repositorio.upse.edu.ec/handle/46000/4447
https://repositorio.upse.edu.ec/handle/46000/4454
https://repositorio.upse.edu.ec/handle/46000/4453
https://repositorio.upse.edu.ec/handle/46000/4455
https://repositorio.upse.edu.ec/handle/46000/4457
https://repositorio.upse.edu.ec/handle/46000/4514
https://repositorio.upse.edu.ec/handle/46000/4521
https://repositorio.upse.edu.ec/handle/46000/4520
https://repositorio.upse.edu.ec/handle/46000/4522
https://repositorio.upse.edu.ec/handle/46000/4519
https://repositorio.upse.edu.ec/handle/46000/4524
https://repositorio.upse.edu.ec/handle/46000/4525
https://repositorio.upse.edu.ec/handle/46000/4526
https://repositorio.upse.edu.ec/handle/46000/4527
https://repositorio.upse.edu.ec/handle/46000/4528
https://repositorio.upse.edu.ec/handle/46000/4532
https://repositorio.upse.edu.ec/handle/46000/4530
https://repositorio.upse.edu.ec/handle/46000/4533
https://repositorio.upse.edu.ec/handle/46000/4529
https://repositorio.upse.edu.ec/handle/46000/4536
https://repositorio.upse.edu.ec/handle/46000/4537
https://repositorio.upse.edu.ec/handle/46000/4542
https://repositorio.upse.edu.ec/handle/46000/4541
https://repositorio.upse.edu.ec/handle/46000/4548
https://repositorio.upse.edu.ec/handle/46000/4553
https://repositorio.upse.edu.ec/handle/46000/4546
https://repositorio.upse.edu.ec/handle/46000/4554
https://repositorio.upse.edu.ec/handle/46000/4555
https://repositorio.upse.edu.ec/handle/46000/4559
https://repositorio.upse.edu.ec/handle/46000/4567
https://repositorio.upse.edu.ec/handle/46000/4577
https://repositorio.upse.edu.ec/handle/46000/4572
https://repositorio.upse.edu.ec/handle/46000/4578
https://repositorio.upse.edu.ec/handle/46000/4580
https://repositorio.upse.edu.ec/handle/46000/4579
https://repositorio.upse.edu.ec/handle/46000/4588
https://repositorio.upse.edu.ec/handle/46000/4600
https://repositorio.upse.edu.ec/handle/46000/4599
https://repositorio.upse.edu.ec/handle/46000/4606
https://repositorio.upse.edu.ec/handle/46000/4573
https://repositorio.upse.edu.ec/handle/46000/4574
https://repositorio.upse.edu.ec/handle/46000/4576
https://repositorio.upse.edu.ec/handle/46000/4575
https://repositorio.upse.edu.ec/handle/46000/4581
https://repositorio.upse.edu.ec/handle/46000/4583
https://repositorio.upse.edu.ec/handle/46000/4584
https://repositorio.upse.edu.ec/handle/46000/4620
https://repositorio.upse.edu.ec/handle/46000/4619
https://repositorio.upse.edu.ec/handle/46000/4565
https://repositorio.upse.edu.ec/handle/46000/4566
https://repositorio.upse.edu.ec/handle/46000/4569
https://repositorio.upse.edu.ec/handle/46000/4570
https://repositorio.upse.edu.ec/handle/46000/4571
https://repositorio.upse.edu.ec/handle/46000/4582
https://repositorio.upse.edu.ec/handle/46000/4585
https://repositorio.upse.edu.ec/handle/46000/4586
https://repositorio.upse.edu.ec/handle/46000/4587
https://repositorio.upse.edu.ec/handle/46000/4611
https://repositorio.upse.edu.ec/handle/46000/4609
https://repositorio.upse.edu.ec/handle/46000/4612
https://repositorio.upse.edu.ec/handle/46000/4624
https://repositorio.upse.edu.ec/handle/46000/4625
https://repositorio.upse.edu.ec/handle/46000/4623
https://repositorio.upse.edu.ec/handle/46000/4615
https://repositorio.upse.edu.ec/handle/46000/4628
https://repositorio.upse.edu.ec/handle/46000/4627
https://repositorio.upse.edu.ec/handle/46000/4626
https://repositorio.upse.edu.ec/handle/46000/4629
https://repositorio.upse.edu.ec/handle/46000/4630
https://repositorio.upse.edu.ec/handle/46000/4632
https://repositorio.upse.edu.ec/handle/46000/4631
https://repositorio.upse.edu.ec/handle/46000/4633
https://repositorio.upse.edu.ec/handle/46000/4634
https://repositorio.upse.edu.ec/handle/46000/4635
https://repositorio.upse.edu.ec/handle/46000/4636
https://repositorio.upse.edu.ec/handle/46000/4637
https://repositorio.upse.edu.ec/handle/46000/4639
https://repositorio.upse.edu.ec/handle/46000/4638
https://repositorio.upse.edu.ec/handle/46000/4647
https://repositorio.upse.edu.ec/handle/46000/4648
https://repositorio.upse.edu.ec/handle/46000/4640
https://repositorio.upse.edu.ec/handle/46000/4641
https://repositorio.upse.edu.ec/handle/46000/4642
https://repositorio.upse.edu.ec/handle/46000/4643
https://repositorio.upse.edu.ec/handle/46000/4649
https://repositorio.upse.edu.ec/handle/46000/4650
https://repositorio.upse.edu.ec/handle/46000/4727
https://repositorio.upse.edu.ec/handle/46000/4742
https://repositorio.upse.edu.ec/handle/46000/4741
https://repositorio.upse.edu.ec/handle/46000/4744
https://repositorio.upse.edu.ec/handle/46000/4745
https://repositorio.upse.edu.ec/handle/46000/4761
https://repositorio.upse.edu.ec/handle/46000/4762
https://repositorio.upse.edu.ec/handle/46000/4764
https://repositorio.upse.edu.ec/handle/46000/4767
https://repositorio.upse.edu.ec/handle/46000/4765
https://repositorio.upse.edu.ec/handle/46000/4768
https://repositorio.upse.edu.ec/handle/46000/4766
https://repositorio.upse.edu.ec/handle/46000/4769
https://repositorio.upse.edu.ec/handle/46000/4776
https://repositorio.upse.edu.ec/handle/46000/4792
https://repositorio.upse.edu.ec/handle/46000/4793
https://repositorio.upse.edu.ec/handle/46000/4794
https://repositorio.upse.edu.ec/handle/46000/4802
https://repositorio.upse.edu.ec/handle/46000/4809
https://repositorio.upse.edu.ec/handle/46000/4812
https://repositorio.upse.edu.ec/handle/46000/4814
https://repositorio.upse.edu.ec/handle/46000/4651
https://repositorio.upse.edu.ec/handle/46000/4652
https://repositorio.upse.edu.ec/handle/46000/4653
https://repositorio.upse.edu.ec/handle/46000/4666
https://repositorio.upse.edu.ec/handle/46000/4667
https://repositorio.upse.edu.ec/handle/46000/4668
https://repositorio.upse.edu.ec/handle/46000/4669
https://repositorio.upse.edu.ec/handle/46000/4670
https://repositorio.upse.edu.ec/handle/46000/4671
https://repositorio.upse.edu.ec/handle/46000/4686
https://repositorio.upse.edu.ec/handle/46000/4687
https://repositorio.upse.edu.ec/handle/46000/4699
https://repositorio.upse.edu.ec/handle/46000/4704
https://repositorio.upse.edu.ec/handle/46000/4706
https://repositorio.upse.edu.ec/handle/46000/4708
https://repositorio.upse.edu.ec/handle/46000/4705
https://repositorio.upse.edu.ec/handle/46000/4709
https://repositorio.upse.edu.ec/handle/46000/4710
https://repositorio.upse.edu.ec/handle/46000/4712
https://repositorio.upse.edu.ec/handle/46000/4714
https://repositorio.upse.edu.ec/handle/46000/4715
https://repositorio.upse.edu.ec/handle/46000/4716
https://repositorio.upse.edu.ec/handle/46000/4711
https://repositorio.upse.edu.ec/handle/46000/4738
https://repositorio.upse.edu.ec/handle/46000/4729
https://repositorio.upse.edu.ec/handle/46000/4731
https://repositorio.upse.edu.ec/handle/46000/4732
https://repositorio.upse.edu.ec/handle/46000/4735
https://repositorio.upse.edu.ec/handle/46000/4739
https://repositorio.upse.edu.ec/handle/46000/4740
https://repositorio.upse.edu.ec/handle/46000/4743
https://repositorio.upse.edu.ec/handle/46000/4754
https://repositorio.upse.edu.ec/handle/46000/4755
https://repositorio.upse.edu.ec/handle/46000/4756
https://repositorio.upse.edu.ec/handle/46000/4758
https://repositorio.upse.edu.ec/handle/46000/4757
https://repositorio.upse.edu.ec/handle/46000/4759