https://repositorio.upse.edu.ec/handle/46000/1023
https://repositorio.upse.edu.ec/handle/46000/1095
https://repositorio.upse.edu.ec/handle/46000/1493
https://repositorio.upse.edu.ec/handle/46000/882
https://repositorio.upse.edu.ec/handle/46000/1350
https://repositorio.upse.edu.ec/handle/46000/2615
https://repositorio.upse.edu.ec/handle/46000/1443
https://repositorio.upse.edu.ec/handle/46000/1051
https://repositorio.upse.edu.ec/handle/46000/859
https://repositorio.upse.edu.ec/handle/46000/1912
https://repositorio.upse.edu.ec/handle/46000/1041
https://repositorio.upse.edu.ec/handle/46000/1064
https://repositorio.upse.edu.ec/handle/46000/1111
https://repositorio.upse.edu.ec/handle/46000/1256
https://repositorio.upse.edu.ec/handle/46000/1876
https://repositorio.upse.edu.ec/handle/46000/1476
https://repositorio.upse.edu.ec/handle/46000/828
https://repositorio.upse.edu.ec/handle/46000/1018
https://repositorio.upse.edu.ec/handle/46000/1092
https://repositorio.upse.edu.ec/handle/46000/1421
https://repositorio.upse.edu.ec/handle/46000/1072
https://repositorio.upse.edu.ec/handle/46000/860
https://repositorio.upse.edu.ec/handle/46000/1116
https://repositorio.upse.edu.ec/handle/46000/1066
https://repositorio.upse.edu.ec/handle/46000/1909
https://repositorio.upse.edu.ec/handle/46000/1059
https://repositorio.upse.edu.ec/handle/46000/1047
https://repositorio.upse.edu.ec/handle/46000/1932
https://repositorio.upse.edu.ec/handle/46000/1921
https://repositorio.upse.edu.ec/handle/46000/1949
https://repositorio.upse.edu.ec/handle/46000/1957
https://repositorio.upse.edu.ec/handle/46000/1951
https://repositorio.upse.edu.ec/handle/46000/1964
https://repositorio.upse.edu.ec/handle/46000/1966
https://repositorio.upse.edu.ec/handle/46000/1970
https://repositorio.upse.edu.ec/handle/46000/1984
https://repositorio.upse.edu.ec/handle/46000/1992
https://repositorio.upse.edu.ec/handle/46000/893
https://repositorio.upse.edu.ec/handle/46000/2370
https://repositorio.upse.edu.ec/handle/46000/1453
https://repositorio.upse.edu.ec/handle/46000/1298
https://repositorio.upse.edu.ec/handle/46000/1783
https://repositorio.upse.edu.ec/handle/46000/2191
https://repositorio.upse.edu.ec/handle/46000/4192
https://repositorio.upse.edu.ec/handle/46000/1782
https://repositorio.upse.edu.ec/handle/46000/1119
https://repositorio.upse.edu.ec/handle/46000/1454
https://repositorio.upse.edu.ec/handle/46000/1484
https://repositorio.upse.edu.ec/handle/46000/1879
https://repositorio.upse.edu.ec/handle/46000/1196
https://repositorio.upse.edu.ec/handle/46000/1365
https://repositorio.upse.edu.ec/handle/46000/1360
https://repositorio.upse.edu.ec/handle/46000/2192
https://repositorio.upse.edu.ec/handle/46000/1989
https://repositorio.upse.edu.ec/handle/46000/2344
https://repositorio.upse.edu.ec/handle/46000/1502
https://repositorio.upse.edu.ec/handle/46000/867
https://repositorio.upse.edu.ec/handle/46000/1474
https://repositorio.upse.edu.ec/handle/46000/2059
https://repositorio.upse.edu.ec/handle/46000/2225
https://repositorio.upse.edu.ec/handle/46000/1521
https://repositorio.upse.edu.ec/handle/46000/1178
https://repositorio.upse.edu.ec/handle/46000/2305
https://repositorio.upse.edu.ec/handle/46000/1617
https://repositorio.upse.edu.ec/handle/46000/1495
https://repositorio.upse.edu.ec/handle/46000/1501
https://repositorio.upse.edu.ec/handle/46000/2345
https://repositorio.upse.edu.ec/handle/46000/1348
https://repositorio.upse.edu.ec/handle/46000/2400
https://repositorio.upse.edu.ec/handle/46000/1869
https://repositorio.upse.edu.ec/handle/46000/2250
https://repositorio.upse.edu.ec/handle/46000/1371
https://repositorio.upse.edu.ec/handle/46000/1117
https://repositorio.upse.edu.ec/handle/46000/1499
https://repositorio.upse.edu.ec/handle/46000/2274
https://repositorio.upse.edu.ec/handle/46000/2347
https://repositorio.upse.edu.ec/handle/46000/1415
https://repositorio.upse.edu.ec/handle/46000/1433
https://repositorio.upse.edu.ec/handle/46000/1368
https://repositorio.upse.edu.ec/handle/46000/1496
https://repositorio.upse.edu.ec/handle/46000/345
https://repositorio.upse.edu.ec/handle/46000/1172
https://repositorio.upse.edu.ec/handle/46000/1441
https://repositorio.upse.edu.ec/handle/46000/1490
https://repositorio.upse.edu.ec/handle/46000/364
https://repositorio.upse.edu.ec/handle/46000/1372
https://repositorio.upse.edu.ec/handle/46000/1481
https://repositorio.upse.edu.ec/handle/46000/1330
https://repositorio.upse.edu.ec/handle/46000/1438
https://repositorio.upse.edu.ec/handle/46000/1450
https://repositorio.upse.edu.ec/handle/46000/1445
https://repositorio.upse.edu.ec/handle/46000/1440
https://repositorio.upse.edu.ec/handle/46000/1181
https://repositorio.upse.edu.ec/handle/46000/1452
https://repositorio.upse.edu.ec/handle/46000/1429
https://repositorio.upse.edu.ec/handle/46000/1505
https://repositorio.upse.edu.ec/handle/46000/1361
https://repositorio.upse.edu.ec/handle/46000/1451
https://repositorio.upse.edu.ec/handle/46000/1467
https://repositorio.upse.edu.ec/handle/46000/2431
https://repositorio.upse.edu.ec/handle/46000/1469
https://repositorio.upse.edu.ec/handle/46000/1366
https://repositorio.upse.edu.ec/handle/46000/1491
https://repositorio.upse.edu.ec/handle/46000/1359
https://repositorio.upse.edu.ec/handle/46000/2466
https://repositorio.upse.edu.ec/handle/46000/1447
https://repositorio.upse.edu.ec/handle/46000/1967
https://repositorio.upse.edu.ec/handle/46000/1192
https://repositorio.upse.edu.ec/handle/46000/1974
https://repositorio.upse.edu.ec/handle/46000/872
https://repositorio.upse.edu.ec/handle/46000/1485
https://repositorio.upse.edu.ec/handle/46000/492
https://repositorio.upse.edu.ec/handle/46000/2467
https://repositorio.upse.edu.ec/handle/46000/1464
https://repositorio.upse.edu.ec/handle/46000/1417
https://repositorio.upse.edu.ec/handle/46000/1975
https://repositorio.upse.edu.ec/handle/46000/1516
https://repositorio.upse.edu.ec/handle/46000/1492
https://repositorio.upse.edu.ec/handle/46000/1475
https://repositorio.upse.edu.ec/handle/46000/1416
https://repositorio.upse.edu.ec/handle/46000/2472
https://repositorio.upse.edu.ec/handle/46000/1182
https://repositorio.upse.edu.ec/handle/46000/1183
https://repositorio.upse.edu.ec/handle/46000/1681
https://repositorio.upse.edu.ec/handle/46000/2496
https://repositorio.upse.edu.ec/handle/46000/1924
https://repositorio.upse.edu.ec/handle/46000/1364
https://repositorio.upse.edu.ec/handle/46000/1922
https://repositorio.upse.edu.ec/handle/46000/1362
https://repositorio.upse.edu.ec/handle/46000/477
https://repositorio.upse.edu.ec/handle/46000/372
https://repositorio.upse.edu.ec/handle/46000/1427
https://repositorio.upse.edu.ec/handle/46000/1913
https://repositorio.upse.edu.ec/handle/46000/1916
https://repositorio.upse.edu.ec/handle/46000/1971
https://repositorio.upse.edu.ec/handle/46000/1458
https://repositorio.upse.edu.ec/handle/46000/1933
https://repositorio.upse.edu.ec/handle/46000/1689
https://repositorio.upse.edu.ec/handle/46000/2526
https://repositorio.upse.edu.ec/handle/46000/1948
https://repositorio.upse.edu.ec/handle/46000/2722
https://repositorio.upse.edu.ec/handle/46000/2524
https://repositorio.upse.edu.ec/handle/46000/2563
https://repositorio.upse.edu.ec/handle/46000/1973
https://repositorio.upse.edu.ec/handle/46000/1958
https://repositorio.upse.edu.ec/handle/46000/2564
https://repositorio.upse.edu.ec/handle/46000/2892
https://repositorio.upse.edu.ec/handle/46000/2817
https://repositorio.upse.edu.ec/handle/46000/3143
https://repositorio.upse.edu.ec/handle/46000/1060
https://repositorio.upse.edu.ec/handle/46000/2060
https://repositorio.upse.edu.ec/handle/46000/1870
https://repositorio.upse.edu.ec/handle/46000/1668
https://repositorio.upse.edu.ec/handle/46000/2372
https://repositorio.upse.edu.ec/handle/46000/2281
https://repositorio.upse.edu.ec/handle/46000/1666
https://repositorio.upse.edu.ec/handle/46000/2251
https://repositorio.upse.edu.ec/handle/46000/1184
https://repositorio.upse.edu.ec/handle/46000/1687
https://repositorio.upse.edu.ec/handle/46000/1328
https://repositorio.upse.edu.ec/handle/46000/2275
https://repositorio.upse.edu.ec/handle/46000/1972
https://repositorio.upse.edu.ec/handle/46000/1261
https://repositorio.upse.edu.ec/handle/46000/1631
https://repositorio.upse.edu.ec/handle/46000/1126
https://repositorio.upse.edu.ec/handle/46000/1290
https://repositorio.upse.edu.ec/handle/46000/1781
https://repositorio.upse.edu.ec/handle/46000/1663
https://repositorio.upse.edu.ec/handle/46000/2371
https://repositorio.upse.edu.ec/handle/46000/1575
https://repositorio.upse.edu.ec/handle/46000/1456
https://repositorio.upse.edu.ec/handle/46000/1455
https://repositorio.upse.edu.ec/handle/46000/1437
https://repositorio.upse.edu.ec/handle/46000/537
https://repositorio.upse.edu.ec/handle/46000/1683
https://repositorio.upse.edu.ec/handle/46000/1670
https://repositorio.upse.edu.ec/handle/46000/1610
https://repositorio.upse.edu.ec/handle/46000/2527
https://repositorio.upse.edu.ec/handle/46000/2307
https://repositorio.upse.edu.ec/handle/46000/1186
https://repositorio.upse.edu.ec/handle/46000/1667
https://repositorio.upse.edu.ec/handle/46000/2193
https://repositorio.upse.edu.ec/handle/46000/1544
https://repositorio.upse.edu.ec/handle/46000/1680
https://repositorio.upse.edu.ec/handle/46000/2195
https://repositorio.upse.edu.ec/handle/46000/1122
https://repositorio.upse.edu.ec/handle/46000/2433
https://repositorio.upse.edu.ec/handle/46000/2401
https://repositorio.upse.edu.ec/handle/46000/1459
https://repositorio.upse.edu.ec/handle/46000/1346
https://repositorio.upse.edu.ec/handle/46000/1301
https://repositorio.upse.edu.ec/handle/46000/1347
https://repositorio.upse.edu.ec/handle/46000/1160
https://repositorio.upse.edu.ec/handle/46000/1728
https://repositorio.upse.edu.ec/handle/46000/24
https://repositorio.upse.edu.ec/handle/46000/1773
https://repositorio.upse.edu.ec/handle/46000/1208
https://repositorio.upse.edu.ec/handle/46000/1420
https://repositorio.upse.edu.ec/handle/46000/2445
https://repositorio.upse.edu.ec/handle/46000/346
https://repositorio.upse.edu.ec/handle/46000/1457
https://repositorio.upse.edu.ec/handle/46000/1914
https://repositorio.upse.edu.ec/handle/46000/1740
https://repositorio.upse.edu.ec/handle/46000/428
https://repositorio.upse.edu.ec/handle/46000/2196
https://repositorio.upse.edu.ec/handle/46000/1334
https://repositorio.upse.edu.ec/handle/46000/1692
https://repositorio.upse.edu.ec/handle/46000/1163
https://repositorio.upse.edu.ec/handle/46000/30
https://repositorio.upse.edu.ec/handle/46000/1336
https://repositorio.upse.edu.ec/handle/46000/2403
https://repositorio.upse.edu.ec/handle/46000/1761
https://repositorio.upse.edu.ec/handle/46000/2405
https://repositorio.upse.edu.ec/handle/46000/349
https://repositorio.upse.edu.ec/handle/46000/2502
https://repositorio.upse.edu.ec/handle/46000/1553
https://repositorio.upse.edu.ec/handle/46000/1494
https://repositorio.upse.edu.ec/handle/46000/1688
https://repositorio.upse.edu.ec/handle/46000/536
https://repositorio.upse.edu.ec/handle/46000/2752
https://repositorio.upse.edu.ec/handle/46000/1684
https://repositorio.upse.edu.ec/handle/46000/2346
https://repositorio.upse.edu.ec/handle/46000/1349
https://repositorio.upse.edu.ec/handle/46000/1560
https://repositorio.upse.edu.ec/handle/46000/1540
https://repositorio.upse.edu.ec/handle/46000/1651
https://repositorio.upse.edu.ec/handle/46000/2348
https://repositorio.upse.edu.ec/handle/46000/645
https://repositorio.upse.edu.ec/handle/46000/2501
https://repositorio.upse.edu.ec/handle/46000/1194
https://repositorio.upse.edu.ec/handle/46000/2565
https://repositorio.upse.edu.ec/handle/46000/1609
https://repositorio.upse.edu.ec/handle/46000/1923
https://repositorio.upse.edu.ec/handle/46000/1193
https://repositorio.upse.edu.ec/handle/46000/1950
https://repositorio.upse.edu.ec/handle/46000/1165
https://repositorio.upse.edu.ec/handle/46000/1463
https://repositorio.upse.edu.ec/handle/46000/1552
https://repositorio.upse.edu.ec/handle/46000/48
https://repositorio.upse.edu.ec/handle/46000/1465
https://repositorio.upse.edu.ec/handle/46000/1937
https://repositorio.upse.edu.ec/handle/46000/1462
https://repositorio.upse.edu.ec/handle/46000/1466
https://repositorio.upse.edu.ec/handle/46000/55
https://repositorio.upse.edu.ec/handle/46000/1625
https://repositorio.upse.edu.ec/handle/46000/1161
https://repositorio.upse.edu.ec/handle/46000/1396
https://repositorio.upse.edu.ec/handle/46000/1367
https://repositorio.upse.edu.ec/handle/46000/1306
https://repositorio.upse.edu.ec/handle/46000/1586
https://repositorio.upse.edu.ec/handle/46000/1288
https://repositorio.upse.edu.ec/handle/46000/1774
https://repositorio.upse.edu.ec/handle/46000/1741
https://repositorio.upse.edu.ec/handle/46000/1477
https://repositorio.upse.edu.ec/handle/46000/2589
https://repositorio.upse.edu.ec/handle/46000/1754
https://repositorio.upse.edu.ec/handle/46000/1685
https://repositorio.upse.edu.ec/handle/46000/1351
https://repositorio.upse.edu.ec/handle/46000/2588
https://repositorio.upse.edu.ec/handle/46000/1436
https://repositorio.upse.edu.ec/handle/46000/2616
https://repositorio.upse.edu.ec/handle/46000/1986
https://repositorio.upse.edu.ec/handle/46000/2617
https://repositorio.upse.edu.ec/handle/46000/1743
https://repositorio.upse.edu.ec/handle/46000/2661
https://repositorio.upse.edu.ec/handle/46000/2680
https://repositorio.upse.edu.ec/handle/46000/1177
https://repositorio.upse.edu.ec/handle/46000/2469
https://repositorio.upse.edu.ec/handle/46000/2857
https://repositorio.upse.edu.ec/handle/46000/2858
https://repositorio.upse.edu.ec/handle/46000/3022
https://repositorio.upse.edu.ec/handle/46000/3014
https://repositorio.upse.edu.ec/handle/46000/1691
https://repositorio.upse.edu.ec/handle/46000/852
https://repositorio.upse.edu.ec/handle/46000/913
https://repositorio.upse.edu.ec/handle/46000/570
https://repositorio.upse.edu.ec/handle/46000/524
https://repositorio.upse.edu.ec/handle/46000/1779
https://repositorio.upse.edu.ec/handle/46000/2753
https://repositorio.upse.edu.ec/handle/46000/2525
https://repositorio.upse.edu.ec/handle/46000/2781
https://repositorio.upse.edu.ec/handle/46000/2958
https://repositorio.upse.edu.ec/handle/46000/2990
https://repositorio.upse.edu.ec/handle/46000/1027
https://repositorio.upse.edu.ec/handle/46000/1765
https://repositorio.upse.edu.ec/handle/46000/1652
https://repositorio.upse.edu.ec/handle/46000/1771
https://repositorio.upse.edu.ec/handle/46000/3307
https://repositorio.upse.edu.ec/handle/46000/1406
https://repositorio.upse.edu.ec/handle/46000/1003
https://repositorio.upse.edu.ec/handle/46000/1737
https://repositorio.upse.edu.ec/handle/46000/1103
https://repositorio.upse.edu.ec/handle/46000/730
https://repositorio.upse.edu.ec/handle/46000/646
https://repositorio.upse.edu.ec/handle/46000/616
https://repositorio.upse.edu.ec/handle/46000/457
https://repositorio.upse.edu.ec/handle/46000/770
https://repositorio.upse.edu.ec/handle/46000/1335
https://repositorio.upse.edu.ec/handle/46000/1736
https://repositorio.upse.edu.ec/handle/46000/869
https://repositorio.upse.edu.ec/handle/46000/1375
https://repositorio.upse.edu.ec/handle/46000/503
https://repositorio.upse.edu.ec/handle/46000/621
https://repositorio.upse.edu.ec/handle/46000/1174
https://repositorio.upse.edu.ec/handle/46000/569
https://repositorio.upse.edu.ec/handle/46000/655
https://repositorio.upse.edu.ec/handle/46000/793
https://repositorio.upse.edu.ec/handle/46000/1247
https://repositorio.upse.edu.ec/handle/46000/1672
https://repositorio.upse.edu.ec/handle/46000/1413
https://repositorio.upse.edu.ec/handle/46000/878
https://repositorio.upse.edu.ec/handle/46000/732
https://repositorio.upse.edu.ec/handle/46000/458
https://repositorio.upse.edu.ec/handle/46000/1596
https://repositorio.upse.edu.ec/handle/46000/1029
https://repositorio.upse.edu.ec/handle/46000/568
https://repositorio.upse.edu.ec/handle/46000/110
https://repositorio.upse.edu.ec/handle/46000/1759
https://repositorio.upse.edu.ec/handle/46000/1762
https://repositorio.upse.edu.ec/handle/46000/1730
https://repositorio.upse.edu.ec/handle/46000/1549
https://repositorio.upse.edu.ec/handle/46000/875
https://repositorio.upse.edu.ec/handle/46000/949
https://repositorio.upse.edu.ec/handle/46000/556
https://repositorio.upse.edu.ec/handle/46000/782
https://repositorio.upse.edu.ec/handle/46000/1604
https://repositorio.upse.edu.ec/handle/46000/873
https://repositorio.upse.edu.ec/handle/46000/1657
https://repositorio.upse.edu.ec/handle/46000/662
https://repositorio.upse.edu.ec/handle/46000/1217
https://repositorio.upse.edu.ec/handle/46000/1636
https://repositorio.upse.edu.ec/handle/46000/1082
https://repositorio.upse.edu.ec/handle/46000/1189
https://repositorio.upse.edu.ec/handle/46000/1557
https://repositorio.upse.edu.ec/handle/46000/1272
https://repositorio.upse.edu.ec/handle/46000/1210
https://repositorio.upse.edu.ec/handle/46000/1434
https://repositorio.upse.edu.ec/handle/46000/1292
https://repositorio.upse.edu.ec/handle/46000/1764
https://repositorio.upse.edu.ec/handle/46000/1112
https://repositorio.upse.edu.ec/handle/46000/728
https://repositorio.upse.edu.ec/handle/46000/1748
https://repositorio.upse.edu.ec/handle/46000/1381
https://repositorio.upse.edu.ec/handle/46000/724
https://repositorio.upse.edu.ec/handle/46000/1109
https://repositorio.upse.edu.ec/handle/46000/1096
https://repositorio.upse.edu.ec/handle/46000/1760
https://repositorio.upse.edu.ec/handle/46000/1739
https://repositorio.upse.edu.ec/handle/46000/1787
https://repositorio.upse.edu.ec/handle/46000/1263
https://repositorio.upse.edu.ec/handle/46000/1338
https://repositorio.upse.edu.ec/handle/46000/737
https://repositorio.upse.edu.ec/handle/46000/1277
https://repositorio.upse.edu.ec/handle/46000/1632
https://repositorio.upse.edu.ec/handle/46000/589
https://repositorio.upse.edu.ec/handle/46000/1259
https://repositorio.upse.edu.ec/handle/46000/686
https://repositorio.upse.edu.ec/handle/46000/1583
https://repositorio.upse.edu.ec/handle/46000/1768
https://repositorio.upse.edu.ec/handle/46000/795
https://repositorio.upse.edu.ec/handle/46000/1576
https://repositorio.upse.edu.ec/handle/46000/1721
https://repositorio.upse.edu.ec/handle/46000/709
https://repositorio.upse.edu.ec/handle/46000/1770
https://repositorio.upse.edu.ec/handle/46000/1049
https://repositorio.upse.edu.ec/handle/46000/487
https://repositorio.upse.edu.ec/handle/46000/1742
https://repositorio.upse.edu.ec/handle/46000/529
https://repositorio.upse.edu.ec/handle/46000/741
https://repositorio.upse.edu.ec/handle/46000/1690
https://repositorio.upse.edu.ec/handle/46000/1069
https://repositorio.upse.edu.ec/handle/46000/734
https://repositorio.upse.edu.ec/handle/46000/1589
https://repositorio.upse.edu.ec/handle/46000/1118
https://repositorio.upse.edu.ec/handle/46000/947
https://repositorio.upse.edu.ec/handle/46000/1594
https://repositorio.upse.edu.ec/handle/46000/834
https://repositorio.upse.edu.ec/handle/46000/739
https://repositorio.upse.edu.ec/handle/46000/1769
https://repositorio.upse.edu.ec/handle/46000/1747
https://repositorio.upse.edu.ec/handle/46000/1708
https://repositorio.upse.edu.ec/handle/46000/1763
https://repositorio.upse.edu.ec/handle/46000/1147
https://repositorio.upse.edu.ec/handle/46000/554
https://repositorio.upse.edu.ec/handle/46000/668
https://repositorio.upse.edu.ec/handle/46000/2229
https://repositorio.upse.edu.ec/handle/46000/2226
https://repositorio.upse.edu.ec/handle/46000/1682
https://repositorio.upse.edu.ec/handle/46000/2227
https://repositorio.upse.edu.ec/handle/46000/2230
https://repositorio.upse.edu.ec/handle/46000/2228
https://repositorio.upse.edu.ec/handle/46000/2231
https://repositorio.upse.edu.ec/handle/46000/2373
https://repositorio.upse.edu.ec/handle/46000/1990
https://repositorio.upse.edu.ec/handle/46000/1979
https://repositorio.upse.edu.ec/handle/46000/2374
https://repositorio.upse.edu.ec/handle/46000/2061
https://repositorio.upse.edu.ec/handle/46000/911
https://repositorio.upse.edu.ec/handle/46000/1448
https://repositorio.upse.edu.ec/handle/46000/1435
https://repositorio.upse.edu.ec/handle/46000/1442
https://repositorio.upse.edu.ec/handle/46000/1102
https://repositorio.upse.edu.ec/handle/46000/1776
https://repositorio.upse.edu.ec/handle/46000/1497
https://repositorio.upse.edu.ec/handle/46000/1498
https://repositorio.upse.edu.ec/handle/46000/1518
https://repositorio.upse.edu.ec/handle/46000/2528
https://repositorio.upse.edu.ec/handle/46000/1772
https://repositorio.upse.edu.ec/handle/46000/879
https://repositorio.upse.edu.ec/handle/46000/2569
https://repositorio.upse.edu.ec/handle/46000/2682
https://repositorio.upse.edu.ec/handle/46000/1293
https://repositorio.upse.edu.ec/handle/46000/993
https://repositorio.upse.edu.ec/handle/46000/2252
https://repositorio.upse.edu.ec/handle/46000/2349
https://repositorio.upse.edu.ec/handle/46000/2723