http://dspace.utb.edu.ec/handle/49000/16145
http://dspace.utb.edu.ec/handle/49000/16148
http://dspace.utb.edu.ec/handle/49000/16150
http://dspace.utb.edu.ec/handle/49000/16153
http://dspace.utb.edu.ec/handle/49000/16158
http://dspace.utb.edu.ec/handle/49000/16160
http://dspace.utb.edu.ec/handle/49000/16159
http://dspace.utb.edu.ec/handle/49000/16161
http://dspace.utb.edu.ec/handle/49000/16162
http://dspace.utb.edu.ec/handle/49000/16164
http://dspace.utb.edu.ec/handle/49000/16165
http://dspace.utb.edu.ec/handle/49000/16171
http://dspace.utb.edu.ec/handle/49000/16172
http://dspace.utb.edu.ec/handle/49000/16175
http://dspace.utb.edu.ec/handle/49000/16176
http://dspace.utb.edu.ec/handle/49000/16179
http://dspace.utb.edu.ec/handle/49000/16183
http://dspace.utb.edu.ec/handle/49000/16185
http://dspace.utb.edu.ec/handle/49000/16186
http://dspace.utb.edu.ec/handle/49000/16192
http://dspace.utb.edu.ec/handle/49000/16188
http://dspace.utb.edu.ec/handle/49000/16191
http://dspace.utb.edu.ec/handle/49000/16195
http://dspace.utb.edu.ec/handle/49000/16196
http://dspace.utb.edu.ec/handle/49000/16198
http://dspace.utb.edu.ec/handle/49000/16205
http://dspace.utb.edu.ec/handle/49000/16168
http://dspace.utb.edu.ec/handle/49000/16170
http://dspace.utb.edu.ec/handle/49000/16173
http://dspace.utb.edu.ec/handle/49000/16174
http://dspace.utb.edu.ec/handle/49000/16181
http://dspace.utb.edu.ec/handle/49000/16180
http://dspace.utb.edu.ec/handle/49000/16182
http://dspace.utb.edu.ec/handle/49000/16187
http://dspace.utb.edu.ec/handle/49000/16189
http://dspace.utb.edu.ec/handle/49000/16193
http://dspace.utb.edu.ec/handle/49000/16199
http://dspace.utb.edu.ec/handle/49000/16206
http://dspace.utb.edu.ec/handle/49000/16207
http://dspace.utb.edu.ec/handle/49000/16210
http://dspace.utb.edu.ec/handle/49000/16209
http://dspace.utb.edu.ec/handle/49000/16217
http://dspace.utb.edu.ec/handle/49000/16212
http://dspace.utb.edu.ec/handle/49000/16211
http://dspace.utb.edu.ec/handle/49000/16218
http://dspace.utb.edu.ec/handle/49000/16219
http://dspace.utb.edu.ec/handle/49000/16221
http://dspace.utb.edu.ec/handle/49000/16214
http://dspace.utb.edu.ec/handle/49000/16220
http://dspace.utb.edu.ec/handle/49000/16223
http://dspace.utb.edu.ec/handle/49000/16224
http://dspace.utb.edu.ec/handle/49000/16225
http://dspace.utb.edu.ec/handle/49000/16226
http://dspace.utb.edu.ec/handle/49000/16227
http://dspace.utb.edu.ec/handle/49000/16229
http://dspace.utb.edu.ec/handle/49000/16228
http://dspace.utb.edu.ec/handle/49000/16230
http://dspace.utb.edu.ec/handle/49000/16231
http://dspace.utb.edu.ec/handle/49000/16232
http://dspace.utb.edu.ec/handle/49000/16233
http://dspace.utb.edu.ec/handle/49000/16234
http://dspace.utb.edu.ec/handle/49000/16235
http://dspace.utb.edu.ec/handle/49000/16236
http://dspace.utb.edu.ec/handle/49000/16237
http://dspace.utb.edu.ec/handle/49000/16238
http://dspace.utb.edu.ec/handle/49000/16239
http://dspace.utb.edu.ec/handle/49000/16240
http://dspace.utb.edu.ec/handle/49000/16241
http://dspace.utb.edu.ec/handle/49000/16242
http://dspace.utb.edu.ec/handle/49000/16243
http://dspace.utb.edu.ec/handle/49000/16244
http://dspace.utb.edu.ec/handle/49000/16245
http://dspace.utb.edu.ec/handle/49000/16246
http://dspace.utb.edu.ec/handle/49000/16247
http://dspace.utb.edu.ec/handle/49000/16248
http://dspace.utb.edu.ec/handle/49000/16249
http://dspace.utb.edu.ec/handle/49000/16250
http://dspace.utb.edu.ec/handle/49000/16251
http://dspace.utb.edu.ec/handle/49000/16252
http://dspace.utb.edu.ec/handle/49000/16254
http://dspace.utb.edu.ec/handle/49000/16253
http://dspace.utb.edu.ec/handle/49000/16256
http://dspace.utb.edu.ec/handle/49000/16255
http://dspace.utb.edu.ec/handle/49000/16257
http://dspace.utb.edu.ec/handle/49000/16258
http://dspace.utb.edu.ec/handle/49000/16259
http://dspace.utb.edu.ec/handle/49000/16260
http://dspace.utb.edu.ec/handle/49000/16261
http://dspace.utb.edu.ec/handle/49000/16262
http://dspace.utb.edu.ec/handle/49000/16263
http://dspace.utb.edu.ec/handle/49000/16264
http://dspace.utb.edu.ec/handle/49000/16265
http://dspace.utb.edu.ec/handle/49000/16266
http://dspace.utb.edu.ec/handle/49000/16267
http://dspace.utb.edu.ec/handle/49000/16268
http://dspace.utb.edu.ec/handle/49000/16269
http://dspace.utb.edu.ec/handle/49000/16270
http://dspace.utb.edu.ec/handle/49000/16271
http://dspace.utb.edu.ec/handle/49000/16272
http://dspace.utb.edu.ec/handle/49000/16273
http://dspace.utb.edu.ec/handle/49000/16274
http://dspace.utb.edu.ec/handle/49000/16281
http://dspace.utb.edu.ec/handle/49000/16286
http://dspace.utb.edu.ec/handle/49000/16289
http://dspace.utb.edu.ec/handle/49000/16276
http://dspace.utb.edu.ec/handle/49000/16298
http://dspace.utb.edu.ec/handle/49000/16304
http://dspace.utb.edu.ec/handle/49000/16321
http://dspace.utb.edu.ec/handle/49000/16349
http://dspace.utb.edu.ec/handle/49000/16350
http://dspace.utb.edu.ec/handle/49000/16359
http://dspace.utb.edu.ec/handle/49000/16363
http://dspace.utb.edu.ec/handle/49000/16364
http://dspace.utb.edu.ec/handle/49000/16366
http://dspace.utb.edu.ec/handle/49000/16275
http://dspace.utb.edu.ec/handle/49000/16308
http://dspace.utb.edu.ec/handle/49000/16277
http://dspace.utb.edu.ec/handle/49000/16288
http://dspace.utb.edu.ec/handle/49000/16361
http://dspace.utb.edu.ec/handle/49000/16282
http://dspace.utb.edu.ec/handle/49000/16278
http://dspace.utb.edu.ec/handle/49000/16279
http://dspace.utb.edu.ec/handle/49000/16280
http://dspace.utb.edu.ec/handle/49000/16283
http://dspace.utb.edu.ec/handle/49000/16284
http://dspace.utb.edu.ec/handle/49000/16294
http://dspace.utb.edu.ec/handle/49000/16297
http://dspace.utb.edu.ec/handle/49000/16285
http://dspace.utb.edu.ec/handle/49000/16287
http://dspace.utb.edu.ec/handle/49000/16290
http://dspace.utb.edu.ec/handle/49000/16291
http://dspace.utb.edu.ec/handle/49000/16292
http://dspace.utb.edu.ec/handle/49000/16293
http://dspace.utb.edu.ec/handle/49000/16295
http://dspace.utb.edu.ec/handle/49000/16296
http://dspace.utb.edu.ec/handle/49000/16299
http://dspace.utb.edu.ec/handle/49000/16301
http://dspace.utb.edu.ec/handle/49000/16302
http://dspace.utb.edu.ec/handle/49000/16303
http://dspace.utb.edu.ec/handle/49000/16309
http://dspace.utb.edu.ec/handle/49000/16310
http://dspace.utb.edu.ec/handle/49000/16311
http://dspace.utb.edu.ec/handle/49000/16313
http://dspace.utb.edu.ec/handle/49000/16324
http://dspace.utb.edu.ec/handle/49000/16325
http://dspace.utb.edu.ec/handle/49000/16328
http://dspace.utb.edu.ec/handle/49000/16329
http://dspace.utb.edu.ec/handle/49000/16333
http://dspace.utb.edu.ec/handle/49000/16336
http://dspace.utb.edu.ec/handle/49000/16337
http://dspace.utb.edu.ec/handle/49000/16338
http://dspace.utb.edu.ec/handle/49000/16340
http://dspace.utb.edu.ec/handle/49000/16345
http://dspace.utb.edu.ec/handle/49000/16360
http://dspace.utb.edu.ec/handle/49000/16300
http://dspace.utb.edu.ec/handle/49000/16315
http://dspace.utb.edu.ec/handle/49000/16316
http://dspace.utb.edu.ec/handle/49000/16330
http://dspace.utb.edu.ec/handle/49000/16332
http://dspace.utb.edu.ec/handle/49000/16331
http://dspace.utb.edu.ec/handle/49000/16335
http://dspace.utb.edu.ec/handle/49000/16320
http://dspace.utb.edu.ec/handle/49000/16322
http://dspace.utb.edu.ec/handle/49000/16323
http://dspace.utb.edu.ec/handle/49000/16327
http://dspace.utb.edu.ec/handle/49000/16334
http://dspace.utb.edu.ec/handle/49000/16342
http://dspace.utb.edu.ec/handle/49000/16343
http://dspace.utb.edu.ec/handle/49000/16305
http://dspace.utb.edu.ec/handle/49000/16306
http://dspace.utb.edu.ec/handle/49000/16307
http://dspace.utb.edu.ec/handle/49000/16339
http://dspace.utb.edu.ec/handle/49000/16312
http://dspace.utb.edu.ec/handle/49000/16314
http://dspace.utb.edu.ec/handle/49000/16317
http://dspace.utb.edu.ec/handle/49000/16318
http://dspace.utb.edu.ec/handle/49000/16319
http://dspace.utb.edu.ec/handle/49000/16326
http://dspace.utb.edu.ec/handle/49000/16341
http://dspace.utb.edu.ec/handle/49000/16344
http://dspace.utb.edu.ec/handle/49000/16346
http://dspace.utb.edu.ec/handle/49000/16347
http://dspace.utb.edu.ec/handle/49000/16348
http://dspace.utb.edu.ec/handle/49000/16351
http://dspace.utb.edu.ec/handle/49000/16352
http://dspace.utb.edu.ec/handle/49000/16353
http://dspace.utb.edu.ec/handle/49000/16354
http://dspace.utb.edu.ec/handle/49000/16355
http://dspace.utb.edu.ec/handle/49000/16356
http://dspace.utb.edu.ec/handle/49000/16357
http://dspace.utb.edu.ec/handle/49000/16358
http://dspace.utb.edu.ec/handle/49000/16362
http://dspace.utb.edu.ec/handle/49000/16365
http://dspace.utb.edu.ec/handle/49000/16367
http://dspace.utb.edu.ec/handle/49000/16368
http://dspace.utb.edu.ec/handle/49000/16369
http://dspace.utb.edu.ec/handle/49000/16370
http://dspace.utb.edu.ec/handle/49000/16371
http://dspace.utb.edu.ec/handle/49000/16372
http://dspace.utb.edu.ec/handle/49000/16373
http://dspace.utb.edu.ec/handle/49000/16374
http://dspace.utb.edu.ec/handle/49000/16375
http://dspace.utb.edu.ec/handle/49000/16376
http://dspace.utb.edu.ec/handle/49000/16377
http://dspace.utb.edu.ec/handle/49000/16378
http://dspace.utb.edu.ec/handle/49000/16379
http://dspace.utb.edu.ec/handle/49000/16380
http://dspace.utb.edu.ec/handle/49000/16381
http://dspace.utb.edu.ec/handle/49000/16382
http://dspace.utb.edu.ec/handle/49000/16383
http://dspace.utb.edu.ec/handle/49000/16384
http://dspace.utb.edu.ec/handle/49000/16386
http://dspace.utb.edu.ec/handle/49000/16387
http://dspace.utb.edu.ec/handle/49000/16388
http://dspace.utb.edu.ec/handle/49000/16389
http://dspace.utb.edu.ec/handle/49000/16391
http://dspace.utb.edu.ec/handle/49000/16406
http://dspace.utb.edu.ec/handle/49000/16392
http://dspace.utb.edu.ec/handle/49000/16393
http://dspace.utb.edu.ec/handle/49000/16394
http://dspace.utb.edu.ec/handle/49000/16395
http://dspace.utb.edu.ec/handle/49000/16396
http://dspace.utb.edu.ec/handle/49000/16397
http://dspace.utb.edu.ec/handle/49000/16398
http://dspace.utb.edu.ec/handle/49000/16399
http://dspace.utb.edu.ec/handle/49000/16400
http://dspace.utb.edu.ec/handle/49000/16401
http://dspace.utb.edu.ec/handle/49000/16402
http://dspace.utb.edu.ec/handle/49000/16403
http://dspace.utb.edu.ec/handle/49000/16404
http://dspace.utb.edu.ec/handle/49000/16405
http://dspace.utb.edu.ec/handle/49000/16407
http://dspace.utb.edu.ec/handle/49000/16408
http://dspace.utb.edu.ec/handle/49000/16409
http://dspace.utb.edu.ec/handle/49000/16410
http://dspace.utb.edu.ec/handle/49000/16411
http://dspace.utb.edu.ec/handle/49000/16412
http://dspace.utb.edu.ec/handle/49000/16413
http://dspace.utb.edu.ec/handle/49000/16414
http://dspace.utb.edu.ec/handle/49000/16415
http://dspace.utb.edu.ec/handle/49000/16416
http://dspace.utb.edu.ec/handle/49000/16417
http://dspace.utb.edu.ec/handle/49000/16418
http://dspace.utb.edu.ec/handle/49000/16419
http://dspace.utb.edu.ec/handle/49000/16421
http://dspace.utb.edu.ec/handle/49000/16420
http://dspace.utb.edu.ec/handle/49000/16422
http://dspace.utb.edu.ec/handle/49000/16423
http://dspace.utb.edu.ec/handle/49000/16424
http://dspace.utb.edu.ec/handle/49000/16425
http://dspace.utb.edu.ec/handle/49000/16426
http://dspace.utb.edu.ec/handle/49000/16427
http://dspace.utb.edu.ec/handle/49000/16428
http://dspace.utb.edu.ec/handle/49000/16429
http://dspace.utb.edu.ec/handle/49000/16430
http://dspace.utb.edu.ec/handle/49000/16431
http://dspace.utb.edu.ec/handle/49000/16540
http://dspace.utb.edu.ec/handle/49000/16432
http://dspace.utb.edu.ec/handle/49000/16433
http://dspace.utb.edu.ec/handle/49000/16434
http://dspace.utb.edu.ec/handle/49000/16435
http://dspace.utb.edu.ec/handle/49000/16448
http://dspace.utb.edu.ec/handle/49000/16436
http://dspace.utb.edu.ec/handle/49000/16437
http://dspace.utb.edu.ec/handle/49000/16438
http://dspace.utb.edu.ec/handle/49000/16439
http://dspace.utb.edu.ec/handle/49000/16440
http://dspace.utb.edu.ec/handle/49000/16441
http://dspace.utb.edu.ec/handle/49000/16442
http://dspace.utb.edu.ec/handle/49000/16443
http://dspace.utb.edu.ec/handle/49000/16444
http://dspace.utb.edu.ec/handle/49000/16445
http://dspace.utb.edu.ec/handle/49000/16446
http://dspace.utb.edu.ec/handle/49000/16447
http://dspace.utb.edu.ec/handle/49000/16449
http://dspace.utb.edu.ec/handle/49000/16456
http://dspace.utb.edu.ec/handle/49000/16450
http://dspace.utb.edu.ec/handle/49000/16458
http://dspace.utb.edu.ec/handle/49000/16459
http://dspace.utb.edu.ec/handle/49000/16463
http://dspace.utb.edu.ec/handle/49000/16454
http://dspace.utb.edu.ec/handle/49000/16451
http://dspace.utb.edu.ec/handle/49000/16452
http://dspace.utb.edu.ec/handle/49000/16453
http://dspace.utb.edu.ec/handle/49000/16457
http://dspace.utb.edu.ec/handle/49000/16460
http://dspace.utb.edu.ec/handle/49000/16455
http://dspace.utb.edu.ec/handle/49000/16461
http://dspace.utb.edu.ec/handle/49000/16462
http://dspace.utb.edu.ec/handle/49000/16464
http://dspace.utb.edu.ec/handle/49000/16465
http://dspace.utb.edu.ec/handle/49000/16466
http://dspace.utb.edu.ec/handle/49000/16467
http://dspace.utb.edu.ec/handle/49000/16468
http://dspace.utb.edu.ec/handle/49000/16469
http://dspace.utb.edu.ec/handle/49000/16470
http://dspace.utb.edu.ec/handle/49000/16471
http://dspace.utb.edu.ec/handle/49000/16473
http://dspace.utb.edu.ec/handle/49000/16472
http://dspace.utb.edu.ec/handle/49000/16474
http://dspace.utb.edu.ec/handle/49000/16475
http://dspace.utb.edu.ec/handle/49000/16476
http://dspace.utb.edu.ec/handle/49000/16477
http://dspace.utb.edu.ec/handle/49000/16479
http://dspace.utb.edu.ec/handle/49000/16478
http://dspace.utb.edu.ec/handle/49000/16481
http://dspace.utb.edu.ec/handle/49000/16482
http://dspace.utb.edu.ec/handle/49000/16485
http://dspace.utb.edu.ec/handle/49000/16486
http://dspace.utb.edu.ec/handle/49000/16491
http://dspace.utb.edu.ec/handle/49000/16493
http://dspace.utb.edu.ec/handle/49000/16501
http://dspace.utb.edu.ec/handle/49000/16480
http://dspace.utb.edu.ec/handle/49000/16494
http://dspace.utb.edu.ec/handle/49000/16495
http://dspace.utb.edu.ec/handle/49000/16496
http://dspace.utb.edu.ec/handle/49000/16488
http://dspace.utb.edu.ec/handle/49000/16483
http://dspace.utb.edu.ec/handle/49000/16484
http://dspace.utb.edu.ec/handle/49000/16487
http://dspace.utb.edu.ec/handle/49000/16490
http://dspace.utb.edu.ec/handle/49000/16489
http://dspace.utb.edu.ec/handle/49000/16492
http://dspace.utb.edu.ec/handle/49000/16497
http://dspace.utb.edu.ec/handle/49000/16498
http://dspace.utb.edu.ec/handle/49000/16499
http://dspace.utb.edu.ec/handle/49000/16500
http://dspace.utb.edu.ec/handle/49000/16502
http://dspace.utb.edu.ec/handle/49000/16503
http://dspace.utb.edu.ec/handle/49000/16504
http://dspace.utb.edu.ec/handle/49000/16505
http://dspace.utb.edu.ec/handle/49000/16506
http://dspace.utb.edu.ec/handle/49000/16507
http://dspace.utb.edu.ec/handle/49000/16508
http://dspace.utb.edu.ec/handle/49000/16509
http://dspace.utb.edu.ec/handle/49000/16510
http://dspace.utb.edu.ec/handle/49000/16511
http://dspace.utb.edu.ec/handle/49000/16512
http://dspace.utb.edu.ec/handle/49000/16513
http://dspace.utb.edu.ec/handle/49000/16514
http://dspace.utb.edu.ec/handle/49000/16515
http://dspace.utb.edu.ec/handle/49000/16516
http://dspace.utb.edu.ec/handle/49000/16517
http://dspace.utb.edu.ec/handle/49000/16518
http://dspace.utb.edu.ec/handle/49000/16519
http://dspace.utb.edu.ec/handle/49000/16520
http://dspace.utb.edu.ec/handle/49000/16521
http://dspace.utb.edu.ec/handle/49000/16522
http://dspace.utb.edu.ec/handle/49000/16523
http://dspace.utb.edu.ec/handle/49000/16524
http://dspace.utb.edu.ec/handle/49000/16525
http://dspace.utb.edu.ec/handle/49000/16526
http://dspace.utb.edu.ec/handle/49000/16527
http://dspace.utb.edu.ec/handle/49000/16550
http://dspace.utb.edu.ec/handle/49000/16529
http://dspace.utb.edu.ec/handle/49000/16533
http://dspace.utb.edu.ec/handle/49000/16534
http://dspace.utb.edu.ec/handle/49000/16536
http://dspace.utb.edu.ec/handle/49000/16579
http://dspace.utb.edu.ec/handle/49000/16538
http://dspace.utb.edu.ec/handle/49000/16555
http://dspace.utb.edu.ec/handle/49000/16556
http://dspace.utb.edu.ec/handle/49000/16576
http://dspace.utb.edu.ec/handle/49000/16585
http://dspace.utb.edu.ec/handle/49000/16528
http://dspace.utb.edu.ec/handle/49000/16532
http://dspace.utb.edu.ec/handle/49000/16535
http://dspace.utb.edu.ec/handle/49000/16537
http://dspace.utb.edu.ec/handle/49000/16546
http://dspace.utb.edu.ec/handle/49000/16548
http://dspace.utb.edu.ec/handle/49000/16552
http://dspace.utb.edu.ec/handle/49000/16563
http://dspace.utb.edu.ec/handle/49000/16567
http://dspace.utb.edu.ec/handle/49000/16554
http://dspace.utb.edu.ec/handle/49000/16557
http://dspace.utb.edu.ec/handle/49000/16559
http://dspace.utb.edu.ec/handle/49000/16573
http://dspace.utb.edu.ec/handle/49000/16541
http://dspace.utb.edu.ec/handle/49000/16544
http://dspace.utb.edu.ec/handle/49000/16553
http://dspace.utb.edu.ec/handle/49000/16558
http://dspace.utb.edu.ec/handle/49000/16562
http://dspace.utb.edu.ec/handle/49000/16578
http://dspace.utb.edu.ec/handle/49000/16582
http://dspace.utb.edu.ec/handle/49000/16530
http://dspace.utb.edu.ec/handle/49000/16531
http://dspace.utb.edu.ec/handle/49000/16542
http://dspace.utb.edu.ec/handle/49000/16543
http://dspace.utb.edu.ec/handle/49000/16551
http://dspace.utb.edu.ec/handle/49000/16560
http://dspace.utb.edu.ec/handle/49000/16564
http://dspace.utb.edu.ec/handle/49000/16568
http://dspace.utb.edu.ec/handle/49000/16569
http://dspace.utb.edu.ec/handle/49000/16539
http://dspace.utb.edu.ec/handle/49000/16545
http://dspace.utb.edu.ec/handle/49000/16547
http://dspace.utb.edu.ec/handle/49000/16549
http://dspace.utb.edu.ec/handle/49000/16561
http://dspace.utb.edu.ec/handle/49000/16565
http://dspace.utb.edu.ec/handle/49000/16566
http://dspace.utb.edu.ec/handle/49000/16570
http://dspace.utb.edu.ec/handle/49000/16571
http://dspace.utb.edu.ec/handle/49000/16572
http://dspace.utb.edu.ec/handle/49000/16574
http://dspace.utb.edu.ec/handle/49000/16575
http://dspace.utb.edu.ec/handle/49000/16577
http://dspace.utb.edu.ec/handle/49000/16583
http://dspace.utb.edu.ec/handle/49000/16584
http://dspace.utb.edu.ec/handle/49000/16581
http://dspace.utb.edu.ec/handle/49000/16586
http://dspace.utb.edu.ec/handle/49000/16593
http://dspace.utb.edu.ec/handle/49000/16591
http://dspace.utb.edu.ec/handle/49000/16592
http://dspace.utb.edu.ec/handle/49000/16594
http://dspace.utb.edu.ec/handle/49000/16595
http://dspace.utb.edu.ec/handle/49000/16596
http://dspace.utb.edu.ec/handle/49000/16597
http://dspace.utb.edu.ec/handle/49000/16598
http://dspace.utb.edu.ec/handle/49000/16599
http://dspace.utb.edu.ec/handle/49000/16618
http://dspace.utb.edu.ec/handle/49000/16622
http://dspace.utb.edu.ec/handle/49000/16631
http://dspace.utb.edu.ec/handle/49000/16633
http://dspace.utb.edu.ec/handle/49000/16635
http://dspace.utb.edu.ec/handle/49000/16603
http://dspace.utb.edu.ec/handle/49000/16606
http://dspace.utb.edu.ec/handle/49000/16607
http://dspace.utb.edu.ec/handle/49000/16624
http://dspace.utb.edu.ec/handle/49000/16602
http://dspace.utb.edu.ec/handle/49000/16611
http://dspace.utb.edu.ec/handle/49000/16614
http://dspace.utb.edu.ec/handle/49000/16620
http://dspace.utb.edu.ec/handle/49000/16630
http://dspace.utb.edu.ec/handle/49000/16600
http://dspace.utb.edu.ec/handle/49000/16604
http://dspace.utb.edu.ec/handle/49000/16601
http://dspace.utb.edu.ec/handle/49000/16605
http://dspace.utb.edu.ec/handle/49000/16608
http://dspace.utb.edu.ec/handle/49000/16621
http://dspace.utb.edu.ec/handle/49000/16626
http://dspace.utb.edu.ec/handle/49000/16627