https://repositorio.upse.edu.ec/handle/46000/1777
https://repositorio.upse.edu.ec/handle/46000/1880
https://repositorio.upse.edu.ec/handle/46000/2078
https://repositorio.upse.edu.ec/handle/46000/1899
https://repositorio.upse.edu.ec/handle/46000/1204
https://repositorio.upse.edu.ec/handle/46000/1915
https://repositorio.upse.edu.ec/handle/46000/1120
https://repositorio.upse.edu.ec/handle/46000/2080
https://repositorio.upse.edu.ec/handle/46000/1327
https://repositorio.upse.edu.ec/handle/46000/2082
https://repositorio.upse.edu.ec/handle/46000/2194
https://repositorio.upse.edu.ec/handle/46000/1939
https://repositorio.upse.edu.ec/handle/46000/2200
https://repositorio.upse.edu.ec/handle/46000/1945
https://repositorio.upse.edu.ec/handle/46000/564
https://repositorio.upse.edu.ec/handle/46000/1707
https://repositorio.upse.edu.ec/handle/46000/2468
https://repositorio.upse.edu.ec/handle/46000/538
https://repositorio.upse.edu.ec/handle/46000/1778
https://repositorio.upse.edu.ec/handle/46000/3613
https://repositorio.upse.edu.ec/handle/46000/1343
https://repositorio.upse.edu.ec/handle/46000/1033
https://repositorio.upse.edu.ec/handle/46000/1176
https://repositorio.upse.edu.ec/handle/46000/2993
https://repositorio.upse.edu.ec/handle/46000/2987
https://repositorio.upse.edu.ec/handle/46000/1960
https://repositorio.upse.edu.ec/handle/46000/1733
https://repositorio.upse.edu.ec/handle/46000/2497
https://repositorio.upse.edu.ec/handle/46000/2436
https://repositorio.upse.edu.ec/handle/46000/2310
https://repositorio.upse.edu.ec/handle/46000/2308
https://repositorio.upse.edu.ec/handle/46000/2312
https://repositorio.upse.edu.ec/handle/46000/2309
https://repositorio.upse.edu.ec/handle/46000/1871
https://repositorio.upse.edu.ec/handle/46000/1587
https://repositorio.upse.edu.ec/handle/46000/2402
https://repositorio.upse.edu.ec/handle/46000/2437
https://repositorio.upse.edu.ec/handle/46000/2498
https://repositorio.upse.edu.ec/handle/46000/2276
https://repositorio.upse.edu.ec/handle/46000/2277
https://repositorio.upse.edu.ec/handle/46000/2434
https://repositorio.upse.edu.ec/handle/46000/2960
https://repositorio.upse.edu.ec/handle/46000/1928
https://repositorio.upse.edu.ec/handle/46000/1943
https://repositorio.upse.edu.ec/handle/46000/1938
https://repositorio.upse.edu.ec/handle/46000/2438
https://repositorio.upse.edu.ec/handle/46000/2660
https://repositorio.upse.edu.ec/handle/46000/1952
https://repositorio.upse.edu.ec/handle/46000/2404
https://repositorio.upse.edu.ec/handle/46000/1925
https://repositorio.upse.edu.ec/handle/46000/1940
https://repositorio.upse.edu.ec/handle/46000/1954
https://repositorio.upse.edu.ec/handle/46000/2470
https://repositorio.upse.edu.ec/handle/46000/2991
https://repositorio.upse.edu.ec/handle/46000/2984
https://repositorio.upse.edu.ec/handle/46000/2639
https://repositorio.upse.edu.ec/handle/46000/3023
https://repositorio.upse.edu.ec/handle/46000/2643
https://repositorio.upse.edu.ec/handle/46000/2619
https://repositorio.upse.edu.ec/handle/46000/2590
https://repositorio.upse.edu.ec/handle/46000/2645
https://repositorio.upse.edu.ec/handle/46000/2641
https://repositorio.upse.edu.ec/handle/46000/2818
https://repositorio.upse.edu.ec/handle/46000/2819
https://repositorio.upse.edu.ec/handle/46000/2529
https://repositorio.upse.edu.ec/handle/46000/2822
https://repositorio.upse.edu.ec/handle/46000/2567
https://repositorio.upse.edu.ec/handle/46000/2530
https://repositorio.upse.edu.ec/handle/46000/2566
https://repositorio.upse.edu.ec/handle/46000/2618
https://repositorio.upse.edu.ec/handle/46000/2640
https://repositorio.upse.edu.ec/handle/46000/3015
https://repositorio.upse.edu.ec/handle/46000/2754
https://repositorio.upse.edu.ec/handle/46000/2783
https://repositorio.upse.edu.ec/handle/46000/2923
https://repositorio.upse.edu.ec/handle/46000/3153
https://repositorio.upse.edu.ec/handle/46000/3070
https://repositorio.upse.edu.ec/handle/46000/3025
https://repositorio.upse.edu.ec/handle/46000/3079
https://repositorio.upse.edu.ec/handle/46000/3189
https://repositorio.upse.edu.ec/handle/46000/3249
https://repositorio.upse.edu.ec/handle/46000/3191
https://repositorio.upse.edu.ec/handle/46000/3190
https://repositorio.upse.edu.ec/handle/46000/3198
https://repositorio.upse.edu.ec/handle/46000/3199
https://repositorio.upse.edu.ec/handle/46000/3200
https://repositorio.upse.edu.ec/handle/46000/3250
https://repositorio.upse.edu.ec/handle/46000/3224
https://repositorio.upse.edu.ec/handle/46000/3195
https://repositorio.upse.edu.ec/handle/46000/3301
https://repositorio.upse.edu.ec/handle/46000/3614
https://repositorio.upse.edu.ec/handle/46000/725
https://repositorio.upse.edu.ec/handle/46000/2232
https://repositorio.upse.edu.ec/handle/46000/2233
https://repositorio.upse.edu.ec/handle/46000/2329
https://repositorio.upse.edu.ec/handle/46000/2350
https://repositorio.upse.edu.ec/handle/46000/2351
https://repositorio.upse.edu.ec/handle/46000/2375
https://repositorio.upse.edu.ec/handle/46000/2376
https://repositorio.upse.edu.ec/handle/46000/2378
https://repositorio.upse.edu.ec/handle/46000/2681
https://repositorio.upse.edu.ec/handle/46000/2666
https://repositorio.upse.edu.ec/handle/46000/2008
https://repositorio.upse.edu.ec/handle/46000/2062
https://repositorio.upse.edu.ec/handle/46000/2076
https://repositorio.upse.edu.ec/handle/46000/2077
https://repositorio.upse.edu.ec/handle/46000/2081
https://repositorio.upse.edu.ec/handle/46000/2079
https://repositorio.upse.edu.ec/handle/46000/2083
https://repositorio.upse.edu.ec/handle/46000/3091
https://repositorio.upse.edu.ec/handle/46000/3115
https://repositorio.upse.edu.ec/handle/46000/2311
https://repositorio.upse.edu.ec/handle/46000/2282
https://repositorio.upse.edu.ec/handle/46000/3128
https://repositorio.upse.edu.ec/handle/46000/2900
https://repositorio.upse.edu.ec/handle/46000/2896
https://repositorio.upse.edu.ec/handle/46000/890
https://repositorio.upse.edu.ec/handle/46000/888
https://repositorio.upse.edu.ec/handle/46000/894
https://repositorio.upse.edu.ec/handle/46000/885
https://repositorio.upse.edu.ec/handle/46000/884
https://repositorio.upse.edu.ec/handle/46000/887
https://repositorio.upse.edu.ec/handle/46000/883
https://repositorio.upse.edu.ec/handle/46000/1998
https://repositorio.upse.edu.ec/handle/46000/1993
https://repositorio.upse.edu.ec/handle/46000/1995
https://repositorio.upse.edu.ec/handle/46000/1996
https://repositorio.upse.edu.ec/handle/46000/1997
https://repositorio.upse.edu.ec/handle/46000/1994
https://repositorio.upse.edu.ec/handle/46000/1999
https://repositorio.upse.edu.ec/handle/46000/2000
https://repositorio.upse.edu.ec/handle/46000/2001
https://repositorio.upse.edu.ec/handle/46000/2002
https://repositorio.upse.edu.ec/handle/46000/2007
https://repositorio.upse.edu.ec/handle/46000/2863
https://repositorio.upse.edu.ec/handle/46000/2893
https://repositorio.upse.edu.ec/handle/46000/2253
https://repositorio.upse.edu.ec/handle/46000/2255
https://repositorio.upse.edu.ec/handle/46000/2860
https://repositorio.upse.edu.ec/handle/46000/2449
https://repositorio.upse.edu.ec/handle/46000/2406
https://repositorio.upse.edu.ec/handle/46000/2471
https://repositorio.upse.edu.ec/handle/46000/2500
https://repositorio.upse.edu.ec/handle/46000/2439
https://repositorio.upse.edu.ec/handle/46000/2440
https://repositorio.upse.edu.ec/handle/46000/2441
https://repositorio.upse.edu.ec/handle/46000/2897
https://repositorio.upse.edu.ec/handle/46000/917
https://repositorio.upse.edu.ec/handle/46000/2859
https://repositorio.upse.edu.ec/handle/46000/3127
https://repositorio.upse.edu.ec/handle/46000/3112
https://repositorio.upse.edu.ec/handle/46000/914
https://repositorio.upse.edu.ec/handle/46000/916
https://repositorio.upse.edu.ec/handle/46000/915
https://repositorio.upse.edu.ec/handle/46000/901
https://repositorio.upse.edu.ec/handle/46000/920
https://repositorio.upse.edu.ec/handle/46000/921
https://repositorio.upse.edu.ec/handle/46000/923
https://repositorio.upse.edu.ec/handle/46000/926
https://repositorio.upse.edu.ec/handle/46000/891
https://repositorio.upse.edu.ec/handle/46000/2591
https://repositorio.upse.edu.ec/handle/46000/2642
https://repositorio.upse.edu.ec/handle/46000/2662
https://repositorio.upse.edu.ec/handle/46000/2791
https://repositorio.upse.edu.ec/handle/46000/2825
https://repositorio.upse.edu.ec/handle/46000/2789
https://repositorio.upse.edu.ec/handle/46000/2786
https://repositorio.upse.edu.ec/handle/46000/2823
https://repositorio.upse.edu.ec/handle/46000/2793
https://repositorio.upse.edu.ec/handle/46000/2827
https://repositorio.upse.edu.ec/handle/46000/2820
https://repositorio.upse.edu.ec/handle/46000/3130
https://repositorio.upse.edu.ec/handle/46000/2787
https://repositorio.upse.edu.ec/handle/46000/2821
https://repositorio.upse.edu.ec/handle/46000/2826
https://repositorio.upse.edu.ec/handle/46000/2824
https://repositorio.upse.edu.ec/handle/46000/2782
https://repositorio.upse.edu.ec/handle/46000/2784
https://repositorio.upse.edu.ec/handle/46000/2755
https://repositorio.upse.edu.ec/handle/46000/2756
https://repositorio.upse.edu.ec/handle/46000/2785
https://repositorio.upse.edu.ec/handle/46000/2531
https://repositorio.upse.edu.ec/handle/46000/2568
https://repositorio.upse.edu.ec/handle/46000/2570
https://repositorio.upse.edu.ec/handle/46000/2571
https://repositorio.upse.edu.ec/handle/46000/3129
https://repositorio.upse.edu.ec/handle/46000/3138
https://repositorio.upse.edu.ec/handle/46000/3139
https://repositorio.upse.edu.ec/handle/46000/3068
https://repositorio.upse.edu.ec/handle/46000/3069
https://repositorio.upse.edu.ec/handle/46000/3251
https://repositorio.upse.edu.ec/handle/46000/3017
https://repositorio.upse.edu.ec/handle/46000/2985
https://repositorio.upse.edu.ec/handle/46000/2959
https://repositorio.upse.edu.ec/handle/46000/2964
https://repositorio.upse.edu.ec/handle/46000/2992
https://repositorio.upse.edu.ec/handle/46000/3024
https://repositorio.upse.edu.ec/handle/46000/3226
https://repositorio.upse.edu.ec/handle/46000/3302
https://repositorio.upse.edu.ec/handle/46000/3197
https://repositorio.upse.edu.ec/handle/46000/3192
https://repositorio.upse.edu.ec/handle/46000/3303
https://repositorio.upse.edu.ec/handle/46000/3380
https://repositorio.upse.edu.ec/handle/46000/3092
https://repositorio.upse.edu.ec/handle/46000/3144
https://repositorio.upse.edu.ec/handle/46000/3372
https://repositorio.upse.edu.ec/handle/46000/3109
https://repositorio.upse.edu.ec/handle/46000/3110
https://repositorio.upse.edu.ec/handle/46000/3308
https://repositorio.upse.edu.ec/handle/46000/3313
https://repositorio.upse.edu.ec/handle/46000/3319
https://repositorio.upse.edu.ec/handle/46000/3461
https://repositorio.upse.edu.ec/handle/46000/4193
https://repositorio.upse.edu.ec/handle/46000/3363
https://repositorio.upse.edu.ec/handle/46000/3365
https://repositorio.upse.edu.ec/handle/46000/3368
https://repositorio.upse.edu.ec/handle/46000/3527
https://repositorio.upse.edu.ec/handle/46000/2234
https://repositorio.upse.edu.ec/handle/46000/2235
https://repositorio.upse.edu.ec/handle/46000/2236
https://repositorio.upse.edu.ec/handle/46000/2237
https://repositorio.upse.edu.ec/handle/46000/2238
https://repositorio.upse.edu.ec/handle/46000/2377
https://repositorio.upse.edu.ec/handle/46000/2684
https://repositorio.upse.edu.ec/handle/46000/2699
https://repositorio.upse.edu.ec/handle/46000/2895
https://repositorio.upse.edu.ec/handle/46000/3117
https://repositorio.upse.edu.ec/handle/46000/2836
https://repositorio.upse.edu.ec/handle/46000/2828
https://repositorio.upse.edu.ec/handle/46000/2063
https://repositorio.upse.edu.ec/handle/46000/2283
https://repositorio.upse.edu.ec/handle/46000/2830
https://repositorio.upse.edu.ec/handle/46000/2254
https://repositorio.upse.edu.ec/handle/46000/2831
https://repositorio.upse.edu.ec/handle/46000/3141
https://repositorio.upse.edu.ec/handle/46000/2003
https://repositorio.upse.edu.ec/handle/46000/3116
https://repositorio.upse.edu.ec/handle/46000/3140
https://repositorio.upse.edu.ec/handle/46000/2278
https://repositorio.upse.edu.ec/handle/46000/2480
https://repositorio.upse.edu.ec/handle/46000/2483
https://repositorio.upse.edu.ec/handle/46000/2479
https://repositorio.upse.edu.ec/handle/46000/2407
https://repositorio.upse.edu.ec/handle/46000/3040
https://repositorio.upse.edu.ec/handle/46000/892
https://repositorio.upse.edu.ec/handle/46000/919
https://repositorio.upse.edu.ec/handle/46000/918
https://repositorio.upse.edu.ec/handle/46000/2416
https://repositorio.upse.edu.ec/handle/46000/2442
https://repositorio.upse.edu.ec/handle/46000/2443
https://repositorio.upse.edu.ec/handle/46000/2481
https://repositorio.upse.edu.ec/handle/46000/2444
https://repositorio.upse.edu.ec/handle/46000/886
https://repositorio.upse.edu.ec/handle/46000/2197
https://repositorio.upse.edu.ec/handle/46000/2198
https://repositorio.upse.edu.ec/handle/46000/2199
https://repositorio.upse.edu.ec/handle/46000/2482
https://repositorio.upse.edu.ec/handle/46000/2477
https://repositorio.upse.edu.ec/handle/46000/3131
https://repositorio.upse.edu.ec/handle/46000/3111
https://repositorio.upse.edu.ec/handle/46000/2724
https://repositorio.upse.edu.ec/handle/46000/3020
https://repositorio.upse.edu.ec/handle/46000/3018
https://repositorio.upse.edu.ec/handle/46000/3309
https://repositorio.upse.edu.ec/handle/46000/2597
https://repositorio.upse.edu.ec/handle/46000/2592
https://repositorio.upse.edu.ec/handle/46000/2621
https://repositorio.upse.edu.ec/handle/46000/2644
https://repositorio.upse.edu.ec/handle/46000/2594
https://repositorio.upse.edu.ec/handle/46000/2596
https://repositorio.upse.edu.ec/handle/46000/2625
https://repositorio.upse.edu.ec/handle/46000/2624
https://repositorio.upse.edu.ec/handle/46000/3194
https://repositorio.upse.edu.ec/handle/46000/2536
https://repositorio.upse.edu.ec/handle/46000/2473
https://repositorio.upse.edu.ec/handle/46000/2572
https://repositorio.upse.edu.ec/handle/46000/2538
https://repositorio.upse.edu.ec/handle/46000/2532
https://repositorio.upse.edu.ec/handle/46000/2573
https://repositorio.upse.edu.ec/handle/46000/2539
https://repositorio.upse.edu.ec/handle/46000/2540
https://repositorio.upse.edu.ec/handle/46000/2533
https://repositorio.upse.edu.ec/handle/46000/2534
https://repositorio.upse.edu.ec/handle/46000/3193
https://repositorio.upse.edu.ec/handle/46000/3310
https://repositorio.upse.edu.ec/handle/46000/3227
https://repositorio.upse.edu.ec/handle/46000/2962
https://repositorio.upse.edu.ec/handle/46000/3252
https://repositorio.upse.edu.ec/handle/46000/2994
https://repositorio.upse.edu.ec/handle/46000/2933
https://repositorio.upse.edu.ec/handle/46000/2988
https://repositorio.upse.edu.ec/handle/46000/2898
https://repositorio.upse.edu.ec/handle/46000/3236
https://repositorio.upse.edu.ec/handle/46000/3071
https://repositorio.upse.edu.ec/handle/46000/3050
https://repositorio.upse.edu.ec/handle/46000/3231
https://repositorio.upse.edu.ec/handle/46000/3318
https://repositorio.upse.edu.ec/handle/46000/3463
https://repositorio.upse.edu.ec/handle/46000/3271
https://repositorio.upse.edu.ec/handle/46000/3026
https://repositorio.upse.edu.ec/handle/46000/3414
https://repositorio.upse.edu.ec/handle/46000/3093
https://repositorio.upse.edu.ec/handle/46000/2924
https://repositorio.upse.edu.ec/handle/46000/2925
https://repositorio.upse.edu.ec/handle/46000/2932
https://repositorio.upse.edu.ec/handle/46000/3094
https://repositorio.upse.edu.ec/handle/46000/3615
https://repositorio.upse.edu.ec/handle/46000/3422
https://repositorio.upse.edu.ec/handle/46000/2861
https://repositorio.upse.edu.ec/handle/46000/2894
https://repositorio.upse.edu.ec/handle/46000/3145
https://repositorio.upse.edu.ec/handle/46000/2944
https://repositorio.upse.edu.ec/handle/46000/3366
https://repositorio.upse.edu.ec/handle/46000/3415
https://repositorio.upse.edu.ec/handle/46000/3325
https://repositorio.upse.edu.ec/handle/46000/3326
https://repositorio.upse.edu.ec/handle/46000/3421
https://repositorio.upse.edu.ec/handle/46000/3258
https://repositorio.upse.edu.ec/handle/46000/3146
https://repositorio.upse.edu.ec/handle/46000/3659
https://repositorio.upse.edu.ec/handle/46000/3388
https://repositorio.upse.edu.ec/handle/46000/3272
https://repositorio.upse.edu.ec/handle/46000/3416
https://repositorio.upse.edu.ec/handle/46000/3274
https://repositorio.upse.edu.ec/handle/46000/3305
https://repositorio.upse.edu.ec/handle/46000/3529
https://repositorio.upse.edu.ec/handle/46000/3462
https://repositorio.upse.edu.ec/handle/46000/3662
https://repositorio.upse.edu.ec/handle/46000/3530
https://repositorio.upse.edu.ec/handle/46000/3533
https://repositorio.upse.edu.ec/handle/46000/3532
https://repositorio.upse.edu.ec/handle/46000/3413
https://repositorio.upse.edu.ec/handle/46000/3534
https://repositorio.upse.edu.ec/handle/46000/3538
https://repositorio.upse.edu.ec/handle/46000/3535
https://repositorio.upse.edu.ec/handle/46000/4007
https://repositorio.upse.edu.ec/handle/46000/2239
https://repositorio.upse.edu.ec/handle/46000/2352
https://repositorio.upse.edu.ec/handle/46000/2353
https://repositorio.upse.edu.ec/handle/46000/2354
https://repositorio.upse.edu.ec/handle/46000/2593
https://repositorio.upse.edu.ec/handle/46000/2600
https://repositorio.upse.edu.ec/handle/46000/2535
https://repositorio.upse.edu.ec/handle/46000/2384
https://repositorio.upse.edu.ec/handle/46000/2379
https://repositorio.upse.edu.ec/handle/46000/2386
https://repositorio.upse.edu.ec/handle/46000/2380
https://repositorio.upse.edu.ec/handle/46000/2382
https://repositorio.upse.edu.ec/handle/46000/2537
https://repositorio.upse.edu.ec/handle/46000/2515
https://repositorio.upse.edu.ec/handle/46000/2446
https://repositorio.upse.edu.ec/handle/46000/2064
https://repositorio.upse.edu.ec/handle/46000/2084
https://repositorio.upse.edu.ec/handle/46000/2504
https://repositorio.upse.edu.ec/handle/46000/2474
https://repositorio.upse.edu.ec/handle/46000/2447
https://repositorio.upse.edu.ec/handle/46000/2408
https://repositorio.upse.edu.ec/handle/46000/2409
https://repositorio.upse.edu.ec/handle/46000/2410
https://repositorio.upse.edu.ec/handle/46000/2279
https://repositorio.upse.edu.ec/handle/46000/2201
https://repositorio.upse.edu.ec/handle/46000/2512
https://repositorio.upse.edu.ec/handle/46000/2514
https://repositorio.upse.edu.ec/handle/46000/2541
https://repositorio.upse.edu.ec/handle/46000/2004
https://repositorio.upse.edu.ec/handle/46000/2683
https://repositorio.upse.edu.ec/handle/46000/2700
https://repositorio.upse.edu.ec/handle/46000/2757
https://repositorio.upse.edu.ec/handle/46000/3019
https://repositorio.upse.edu.ec/handle/46000/3247
https://repositorio.upse.edu.ec/handle/46000/2297
https://repositorio.upse.edu.ec/handle/46000/2290
https://repositorio.upse.edu.ec/handle/46000/2313
https://repositorio.upse.edu.ec/handle/46000/2284
https://repositorio.upse.edu.ec/handle/46000/2287
https://repositorio.upse.edu.ec/handle/46000/2288
https://repositorio.upse.edu.ec/handle/46000/3228
https://repositorio.upse.edu.ec/handle/46000/2256
https://repositorio.upse.edu.ec/handle/46000/2257
https://repositorio.upse.edu.ec/handle/46000/3459
https://repositorio.upse.edu.ec/handle/46000/3311
https://repositorio.upse.edu.ec/handle/46000/2902
https://repositorio.upse.edu.ec/handle/46000/2383
https://repositorio.upse.edu.ec/handle/46000/2862
https://repositorio.upse.edu.ec/handle/46000/2360
https://repositorio.upse.edu.ec/handle/46000/3217
https://repositorio.upse.edu.ec/handle/46000/2901
https://repositorio.upse.edu.ec/handle/46000/3282
https://repositorio.upse.edu.ec/handle/46000/3320
https://repositorio.upse.edu.ec/handle/46000/2934
https://repositorio.upse.edu.ec/handle/46000/2622
https://repositorio.upse.edu.ec/handle/46000/2788
https://repositorio.upse.edu.ec/handle/46000/2829
https://repositorio.upse.edu.ec/handle/46000/3041
https://repositorio.upse.edu.ec/handle/46000/3321
https://repositorio.upse.edu.ec/handle/46000/3460
https://repositorio.upse.edu.ec/handle/46000/3155
https://repositorio.upse.edu.ec/handle/46000/3132
https://repositorio.upse.edu.ec/handle/46000/2961
https://repositorio.upse.edu.ec/handle/46000/3142
https://repositorio.upse.edu.ec/handle/46000/2995
https://repositorio.upse.edu.ec/handle/46000/2899
https://repositorio.upse.edu.ec/handle/46000/2646
https://repositorio.upse.edu.ec/handle/46000/2664
https://repositorio.upse.edu.ec/handle/46000/2652
https://repositorio.upse.edu.ec/handle/46000/3118
https://repositorio.upse.edu.ec/handle/46000/3072
https://repositorio.upse.edu.ec/handle/46000/2732
https://repositorio.upse.edu.ec/handle/46000/2725
https://repositorio.upse.edu.ec/handle/46000/2734
https://repositorio.upse.edu.ec/handle/46000/2726
https://repositorio.upse.edu.ec/handle/46000/2728
https://repositorio.upse.edu.ec/handle/46000/3053
https://repositorio.upse.edu.ec/handle/46000/3120
https://repositorio.upse.edu.ec/handle/46000/3137