URL List

https://dspace.unl.edu.ec//handle/123456789/20097
https://dspace.unl.edu.ec//handle/123456789/20088
https://dspace.unl.edu.ec//handle/123456789/20091
https://dspace.unl.edu.ec//handle/123456789/20090
https://dspace.unl.edu.ec//handle/123456789/20092
https://dspace.unl.edu.ec//handle/123456789/20098
https://dspace.unl.edu.ec//handle/123456789/20094
https://dspace.unl.edu.ec//handle/123456789/20096
https://dspace.unl.edu.ec//handle/123456789/20095
https://dspace.unl.edu.ec//handle/123456789/20100
https://dspace.unl.edu.ec//handle/123456789/20099
https://dspace.unl.edu.ec//handle/123456789/20101
https://dspace.unl.edu.ec//handle/123456789/17230
https://dspace.unl.edu.ec//handle/123456789/17217
https://dspace.unl.edu.ec//handle/123456789/17239
https://dspace.unl.edu.ec//handle/123456789/17214
https://dspace.unl.edu.ec//handle/123456789/17200
https://dspace.unl.edu.ec//handle/123456789/17195
https://dspace.unl.edu.ec//handle/123456789/20058
https://dspace.unl.edu.ec//handle/123456789/18699
https://dspace.unl.edu.ec//handle/123456789/17189
https://dspace.unl.edu.ec//handle/123456789/17248
https://dspace.unl.edu.ec//handle/123456789/17205
https://dspace.unl.edu.ec//handle/123456789/17263
https://dspace.unl.edu.ec//handle/123456789/17190
https://dspace.unl.edu.ec//handle/123456789/17179
https://dspace.unl.edu.ec//handle/123456789/18694
https://dspace.unl.edu.ec//handle/123456789/17231
https://dspace.unl.edu.ec//handle/123456789/18700
https://dspace.unl.edu.ec//handle/123456789/17221
https://dspace.unl.edu.ec//handle/123456789/18692
https://dspace.unl.edu.ec//handle/123456789/18688
https://dspace.unl.edu.ec//handle/123456789/17210
https://dspace.unl.edu.ec//handle/123456789/17196
https://dspace.unl.edu.ec//handle/123456789/17201
https://dspace.unl.edu.ec//handle/123456789/17180
https://dspace.unl.edu.ec//handle/123456789/17191
https://dspace.unl.edu.ec//handle/123456789/18695
https://dspace.unl.edu.ec//handle/123456789/17218
https://dspace.unl.edu.ec//handle/123456789/17224
https://dspace.unl.edu.ec//handle/123456789/18693
https://dspace.unl.edu.ec//handle/123456789/21629
https://dspace.unl.edu.ec//handle/123456789/17206
https://dspace.unl.edu.ec//handle/123456789/18696
https://dspace.unl.edu.ec//handle/123456789/17186
https://dspace.unl.edu.ec//handle/123456789/17197
https://dspace.unl.edu.ec//handle/123456789/18697
https://dspace.unl.edu.ec//handle/123456789/17234
https://dspace.unl.edu.ec//handle/123456789/17202
https://dspace.unl.edu.ec//handle/123456789/18701
https://dspace.unl.edu.ec//handle/123456789/17244
https://dspace.unl.edu.ec//handle/123456789/17192
https://dspace.unl.edu.ec//handle/123456789/17225
https://dspace.unl.edu.ec//handle/123456789/17187
https://dspace.unl.edu.ec//handle/123456789/17227
https://dspace.unl.edu.ec//handle/123456789/17207
https://dspace.unl.edu.ec//handle/123456789/10638
https://dspace.unl.edu.ec//handle/123456789/17198
https://dspace.unl.edu.ec//handle/123456789/18702
https://dspace.unl.edu.ec//handle/123456789/17193
https://dspace.unl.edu.ec//handle/123456789/17211
https://dspace.unl.edu.ec//handle/123456789/17188
https://dspace.unl.edu.ec//handle/123456789/18703
https://dspace.unl.edu.ec//handle/123456789/17203
https://dspace.unl.edu.ec//handle/123456789/17242
https://dspace.unl.edu.ec//handle/123456789/17194
https://dspace.unl.edu.ec//handle/123456789/18704
https://dspace.unl.edu.ec//handle/123456789/17215
https://dspace.unl.edu.ec//handle/123456789/17212
https://dspace.unl.edu.ec//handle/123456789/17199
https://dspace.unl.edu.ec//handle/123456789/18706
https://dspace.unl.edu.ec//handle/123456789/17252
https://dspace.unl.edu.ec//handle/123456789/17208
https://dspace.unl.edu.ec//handle/123456789/17237
https://dspace.unl.edu.ec//handle/123456789/17204
https://dspace.unl.edu.ec//handle/123456789/18705
https://dspace.unl.edu.ec//handle/123456789/18709
https://dspace.unl.edu.ec//handle/123456789/18707
https://dspace.unl.edu.ec//handle/123456789/17254
https://dspace.unl.edu.ec//handle/123456789/17250
https://dspace.unl.edu.ec//handle/123456789/17228
https://dspace.unl.edu.ec//handle/123456789/17222
https://dspace.unl.edu.ec//handle/123456789/17213
https://dspace.unl.edu.ec//handle/123456789/17240
https://dspace.unl.edu.ec//handle/123456789/17209
https://dspace.unl.edu.ec//handle/123456789/18708
https://dspace.unl.edu.ec//handle/123456789/17219
https://dspace.unl.edu.ec//handle/123456789/17235
https://dspace.unl.edu.ec//handle/123456789/17223
https://dspace.unl.edu.ec//handle/123456789/17220
https://dspace.unl.edu.ec//handle/123456789/17216
https://dspace.unl.edu.ec//handle/123456789/17229
https://dspace.unl.edu.ec//handle/123456789/17270
https://dspace.unl.edu.ec//handle/123456789/17232
https://dspace.unl.edu.ec//handle/123456789/17256
https://dspace.unl.edu.ec//handle/123456789/18710
https://dspace.unl.edu.ec//handle/123456789/17226
https://dspace.unl.edu.ec//handle/123456789/17258
https://dspace.unl.edu.ec//handle/123456789/17233
https://dspace.unl.edu.ec//handle/123456789/17238
https://dspace.unl.edu.ec//handle/123456789/17245
https://dspace.unl.edu.ec//handle/123456789/17243
https://dspace.unl.edu.ec//handle/123456789/17261
https://dspace.unl.edu.ec//handle/123456789/17241
https://dspace.unl.edu.ec//handle/123456789/17251
https://dspace.unl.edu.ec//handle/123456789/17236
https://dspace.unl.edu.ec//handle/123456789/17272
https://dspace.unl.edu.ec//handle/123456789/17262
https://dspace.unl.edu.ec//handle/123456789/17253
https://dspace.unl.edu.ec//handle/123456789/17249
https://dspace.unl.edu.ec//handle/123456789/17260
https://dspace.unl.edu.ec//handle/123456789/17246
https://dspace.unl.edu.ec//handle/123456789/17255
https://dspace.unl.edu.ec//handle/123456789/17265
https://dspace.unl.edu.ec//handle/123456789/17264
https://dspace.unl.edu.ec//handle/123456789/17257
https://dspace.unl.edu.ec//handle/123456789/17259
https://dspace.unl.edu.ec//handle/123456789/17269
https://dspace.unl.edu.ec//handle/123456789/17266
https://dspace.unl.edu.ec//handle/123456789/17271
https://dspace.unl.edu.ec//handle/123456789/17267
https://dspace.unl.edu.ec//handle/123456789/17268
https://dspace.unl.edu.ec//handle/123456789/17273
https://dspace.unl.edu.ec//handle/123456789/18732
https://dspace.unl.edu.ec//handle/123456789/17297
https://dspace.unl.edu.ec//handle/123456789/17286
https://dspace.unl.edu.ec//handle/123456789/18730
https://dspace.unl.edu.ec//handle/123456789/17280
https://dspace.unl.edu.ec//handle/123456789/17341
https://dspace.unl.edu.ec//handle/123456789/17317
https://dspace.unl.edu.ec//handle/123456789/17274
https://dspace.unl.edu.ec//handle/123456789/17292
https://dspace.unl.edu.ec//handle/123456789/18711
https://dspace.unl.edu.ec//handle/123456789/18719
https://dspace.unl.edu.ec//handle/123456789/17306
https://dspace.unl.edu.ec//handle/123456789/17287
https://dspace.unl.edu.ec//handle/123456789/17281
https://dspace.unl.edu.ec//handle/123456789/18741
https://dspace.unl.edu.ec//handle/123456789/17275
https://dspace.unl.edu.ec//handle/123456789/17347
https://dspace.unl.edu.ec//handle/123456789/17310
https://dspace.unl.edu.ec//handle/123456789/17302
https://dspace.unl.edu.ec//handle/123456789/17293
https://dspace.unl.edu.ec//handle/123456789/18727
https://dspace.unl.edu.ec//handle/123456789/17276
https://dspace.unl.edu.ec//handle/123456789/17282
https://dspace.unl.edu.ec//handle/123456789/21630
https://dspace.unl.edu.ec//handle/123456789/17288
https://dspace.unl.edu.ec//handle/123456789/17314
https://dspace.unl.edu.ec//handle/123456789/17298
https://dspace.unl.edu.ec//handle/123456789/18720
https://dspace.unl.edu.ec//handle/123456789/17321
https://dspace.unl.edu.ec//handle/123456789/17339
https://dspace.unl.edu.ec//handle/123456789/17277
https://dspace.unl.edu.ec//handle/123456789/17327
https://dspace.unl.edu.ec//handle/123456789/17337
https://dspace.unl.edu.ec//handle/123456789/17283
https://dspace.unl.edu.ec//handle/123456789/17318
https://dspace.unl.edu.ec//handle/123456789/17294
https://dspace.unl.edu.ec//handle/123456789/18731
https://dspace.unl.edu.ec//handle/123456789/17289
https://dspace.unl.edu.ec//handle/123456789/17307
https://dspace.unl.edu.ec//handle/123456789/17303
https://dspace.unl.edu.ec//handle/123456789/17278
https://dspace.unl.edu.ec//handle/123456789/18752
https://dspace.unl.edu.ec//handle/123456789/17332
https://dspace.unl.edu.ec//handle/123456789/17284
https://dspace.unl.edu.ec//handle/123456789/18750
https://dspace.unl.edu.ec//handle/123456789/17299
https://dspace.unl.edu.ec//handle/123456789/17311
https://dspace.unl.edu.ec//handle/123456789/17352
https://dspace.unl.edu.ec//handle/123456789/17290
https://dspace.unl.edu.ec//handle/123456789/17295
https://dspace.unl.edu.ec//handle/123456789/17279
https://dspace.unl.edu.ec//handle/123456789/18754
https://dspace.unl.edu.ec//handle/123456789/17335
https://dspace.unl.edu.ec//handle/123456789/17285
https://dspace.unl.edu.ec//handle/123456789/18755
https://dspace.unl.edu.ec//handle/123456789/17315
https://dspace.unl.edu.ec//handle/123456789/17330
https://dspace.unl.edu.ec//handle/123456789/17304
https://dspace.unl.edu.ec//handle/123456789/17308
https://dspace.unl.edu.ec//handle/123456789/17291
https://dspace.unl.edu.ec//handle/123456789/18764
https://dspace.unl.edu.ec//handle/123456789/17300
https://dspace.unl.edu.ec//handle/123456789/17296
https://dspace.unl.edu.ec//handle/123456789/18774
https://dspace.unl.edu.ec//handle/123456789/17324
https://dspace.unl.edu.ec//handle/123456789/17342
https://dspace.unl.edu.ec//handle/123456789/17351
https://dspace.unl.edu.ec//handle/123456789/18781
https://dspace.unl.edu.ec//handle/123456789/17312
https://dspace.unl.edu.ec//handle/123456789/18777
https://dspace.unl.edu.ec//handle/123456789/17333
https://dspace.unl.edu.ec//handle/123456789/17319
https://dspace.unl.edu.ec//handle/123456789/17305
https://dspace.unl.edu.ec//handle/123456789/17326
https://dspace.unl.edu.ec//handle/123456789/17346
https://dspace.unl.edu.ec//handle/123456789/17301
https://dspace.unl.edu.ec//handle/123456789/18779
https://dspace.unl.edu.ec//handle/123456789/17325
https://dspace.unl.edu.ec//handle/123456789/17309
https://dspace.unl.edu.ec//handle/123456789/17316
https://dspace.unl.edu.ec//handle/123456789/18778
https://dspace.unl.edu.ec//handle/123456789/17328
https://dspace.unl.edu.ec//handle/123456789/17322
https://dspace.unl.edu.ec//handle/123456789/17340
https://dspace.unl.edu.ec//handle/123456789/17344
https://dspace.unl.edu.ec//handle/123456789/17313
https://dspace.unl.edu.ec//handle/123456789/17323
https://dspace.unl.edu.ec//handle/123456789/18785
https://dspace.unl.edu.ec//handle/123456789/17320
https://dspace.unl.edu.ec//handle/123456789/17331
https://dspace.unl.edu.ec//handle/123456789/17349
https://dspace.unl.edu.ec//handle/123456789/17334
https://dspace.unl.edu.ec//handle/123456789/17329
https://dspace.unl.edu.ec//handle/123456789/17338
https://dspace.unl.edu.ec//handle/123456789/17336
https://dspace.unl.edu.ec//handle/123456789/17348
https://dspace.unl.edu.ec//handle/123456789/17350
https://dspace.unl.edu.ec//handle/123456789/17355
https://dspace.unl.edu.ec//handle/123456789/17354
https://dspace.unl.edu.ec//handle/123456789/17345
https://dspace.unl.edu.ec//handle/123456789/17356
https://dspace.unl.edu.ec//handle/123456789/17353
https://dspace.unl.edu.ec//handle/123456789/17357
https://dspace.unl.edu.ec//handle/123456789/17358
https://dspace.unl.edu.ec//handle/123456789/17369
https://dspace.unl.edu.ec//handle/123456789/17363
https://dspace.unl.edu.ec//handle/123456789/17362
https://dspace.unl.edu.ec//handle/123456789/20857
https://dspace.unl.edu.ec//handle/123456789/21636
https://dspace.unl.edu.ec//handle/123456789/18751
https://dspace.unl.edu.ec//handle/123456789/18737
https://dspace.unl.edu.ec//handle/123456789/18717
https://dspace.unl.edu.ec//handle/123456789/18766
https://dspace.unl.edu.ec//handle/123456789/17359
https://dspace.unl.edu.ec//handle/123456789/18762
https://dspace.unl.edu.ec//handle/123456789/18742
https://dspace.unl.edu.ec//handle/123456789/18698
https://dspace.unl.edu.ec//handle/123456789/21664
https://dspace.unl.edu.ec//handle/123456789/18724
https://dspace.unl.edu.ec//handle/123456789/14298
https://dspace.unl.edu.ec//handle/123456789/21631
https://dspace.unl.edu.ec//handle/123456789/18712
https://dspace.unl.edu.ec//handle/123456789/21644
https://dspace.unl.edu.ec//handle/123456789/17360
https://dspace.unl.edu.ec//handle/123456789/3923
https://dspace.unl.edu.ec//handle/123456789/4048
https://dspace.unl.edu.ec//handle/123456789/20835
https://dspace.unl.edu.ec//handle/123456789/18769
https://dspace.unl.edu.ec//handle/123456789/18747
https://dspace.unl.edu.ec//handle/123456789/18738
https://dspace.unl.edu.ec//handle/123456789/18753
https://dspace.unl.edu.ec//handle/123456789/18718
https://dspace.unl.edu.ec//handle/123456789/5463
https://dspace.unl.edu.ec//handle/123456789/21658
https://dspace.unl.edu.ec//handle/123456789/18734
https://dspace.unl.edu.ec//handle/123456789/21633
https://dspace.unl.edu.ec//handle/123456789/18713
https://dspace.unl.edu.ec//handle/123456789/18725
https://dspace.unl.edu.ec//handle/123456789/18743
https://dspace.unl.edu.ec//handle/123456789/18789
https://dspace.unl.edu.ec//handle/123456789/18772
https://dspace.unl.edu.ec//handle/123456789/18714
https://dspace.unl.edu.ec//handle/123456789/18721
https://dspace.unl.edu.ec//handle/123456789/21666
https://dspace.unl.edu.ec//handle/123456789/18759
https://dspace.unl.edu.ec//handle/123456789/18735
https://dspace.unl.edu.ec//handle/123456789/21669
https://dspace.unl.edu.ec//handle/123456789/18726
https://dspace.unl.edu.ec//handle/123456789/18739
https://dspace.unl.edu.ec//handle/123456789/18787
https://dspace.unl.edu.ec//handle/123456789/18776
https://dspace.unl.edu.ec//handle/123456789/18715
https://dspace.unl.edu.ec//handle/123456789/18744
https://dspace.unl.edu.ec//handle/123456789/18722
https://dspace.unl.edu.ec//handle/123456789/18763
https://dspace.unl.edu.ec//handle/123456789/22964
https://dspace.unl.edu.ec//handle/123456789/18748
https://dspace.unl.edu.ec//handle/123456789/18728
https://dspace.unl.edu.ec//handle/123456789/18716
https://dspace.unl.edu.ec//handle/123456789/7835
https://dspace.unl.edu.ec//handle/123456789/18740
https://dspace.unl.edu.ec//handle/123456789/18736
https://dspace.unl.edu.ec//handle/123456789/18723
https://dspace.unl.edu.ec//handle/123456789/18745
https://dspace.unl.edu.ec//handle/123456789/18749
https://dspace.unl.edu.ec//handle/123456789/18784
https://dspace.unl.edu.ec//handle/123456789/18770
https://dspace.unl.edu.ec//handle/123456789/18767
https://dspace.unl.edu.ec//handle/123456789/18756
https://dspace.unl.edu.ec//handle/123456789/18782
https://dspace.unl.edu.ec//handle/123456789/18746
https://dspace.unl.edu.ec//handle/123456789/18773
https://dspace.unl.edu.ec//handle/123456789/18757
https://dspace.unl.edu.ec//handle/123456789/20867
https://dspace.unl.edu.ec//handle/123456789/18761
https://dspace.unl.edu.ec//handle/123456789/18765
https://dspace.unl.edu.ec//handle/123456789/20865
https://dspace.unl.edu.ec//handle/123456789/18758
https://dspace.unl.edu.ec//handle/123456789/20839
https://dspace.unl.edu.ec//handle/123456789/18768
https://dspace.unl.edu.ec//handle/123456789/20852
https://dspace.unl.edu.ec//handle/123456789/20102
https://dspace.unl.edu.ec//handle/123456789/18775
https://dspace.unl.edu.ec//handle/123456789/18788
https://dspace.unl.edu.ec//handle/123456789/18783
https://dspace.unl.edu.ec//handle/123456789/20864
https://dspace.unl.edu.ec//handle/123456789/18790
https://dspace.unl.edu.ec//handle/123456789/20856
https://dspace.unl.edu.ec//handle/123456789/18780
https://dspace.unl.edu.ec//handle/123456789/18786
https://dspace.unl.edu.ec//handle/123456789/20834
https://dspace.unl.edu.ec//handle/123456789/20858
https://dspace.unl.edu.ec//handle/123456789/20838
https://dspace.unl.edu.ec//handle/123456789/18733
https://dspace.unl.edu.ec//handle/123456789/20863
https://dspace.unl.edu.ec//handle/123456789/20833
https://dspace.unl.edu.ec//handle/123456789/20847
https://dspace.unl.edu.ec//handle/123456789/20872
https://dspace.unl.edu.ec//handle/123456789/20870
https://dspace.unl.edu.ec//handle/123456789/20854
https://dspace.unl.edu.ec//handle/123456789/20851
https://dspace.unl.edu.ec//handle/123456789/20859
https://dspace.unl.edu.ec//handle/123456789/20866
https://dspace.unl.edu.ec//handle/123456789/20861
https://dspace.unl.edu.ec//handle/123456789/20869
https://dspace.unl.edu.ec//handle/123456789/20868
https://dspace.unl.edu.ec//handle/123456789/18729
https://dspace.unl.edu.ec//handle/123456789/18846
https://dspace.unl.edu.ec//handle/123456789/18796
https://dspace.unl.edu.ec//handle/123456789/17361
https://dspace.unl.edu.ec//handle/123456789/21646
https://dspace.unl.edu.ec//handle/123456789/18820
https://dspace.unl.edu.ec//handle/123456789/18802
https://dspace.unl.edu.ec//handle/123456789/18824
https://dspace.unl.edu.ec//handle/123456789/18791
https://dspace.unl.edu.ec//handle/123456789/6497
https://dspace.unl.edu.ec//handle/123456789/18855
https://dspace.unl.edu.ec//handle/123456789/21634
https://dspace.unl.edu.ec//handle/123456789/18859
https://dspace.unl.edu.ec//handle/123456789/18807
https://dspace.unl.edu.ec//handle/123456789/18812
https://dspace.unl.edu.ec//handle/123456789/21647
https://dspace.unl.edu.ec//handle/123456789/18840
https://dspace.unl.edu.ec//handle/123456789/18857
https://dspace.unl.edu.ec//handle/123456789/18828
https://dspace.unl.edu.ec//handle/123456789/18803
https://dspace.unl.edu.ec//handle/123456789/17368
https://dspace.unl.edu.ec//handle/123456789/21649
https://dspace.unl.edu.ec//handle/123456789/18808
https://dspace.unl.edu.ec//handle/123456789/18825
https://dspace.unl.edu.ec//handle/123456789/18798
https://dspace.unl.edu.ec//handle/123456789/18849
https://dspace.unl.edu.ec//handle/123456789/18835
https://dspace.unl.edu.ec//handle/123456789/18817
https://dspace.unl.edu.ec//handle/123456789/18804
https://dspace.unl.edu.ec//handle/123456789/18813
https://dspace.unl.edu.ec//handle/123456789/18793
https://dspace.unl.edu.ec//handle/123456789/18851
https://dspace.unl.edu.ec//handle/123456789/18799
https://dspace.unl.edu.ec//handle/123456789/22550
https://dspace.unl.edu.ec//handle/123456789/18841
https://dspace.unl.edu.ec//handle/123456789/18832
https://dspace.unl.edu.ec//handle/123456789/18809
https://dspace.unl.edu.ec//handle/123456789/18794
https://dspace.unl.edu.ec//handle/123456789/18805
https://dspace.unl.edu.ec//handle/123456789/18829
https://dspace.unl.edu.ec//handle/123456789/18800
https://dspace.unl.edu.ec//handle/123456789/18834
https://dspace.unl.edu.ec//handle/123456789/18818
https://dspace.unl.edu.ec//handle/123456789/18795
https://dspace.unl.edu.ec//handle/123456789/18838
https://dspace.unl.edu.ec//handle/123456789/18826
https://dspace.unl.edu.ec//handle/123456789/18844
https://dspace.unl.edu.ec//handle/123456789/18806
https://dspace.unl.edu.ec//handle/123456789/18801
https://dspace.unl.edu.ec//handle/123456789/18814
https://dspace.unl.edu.ec//handle/123456789/18861
https://dspace.unl.edu.ec//handle/123456789/18822
https://dspace.unl.edu.ec//handle/123456789/18819
https://dspace.unl.edu.ec//handle/123456789/18836
https://dspace.unl.edu.ec//handle/123456789/18839
https://dspace.unl.edu.ec//handle/123456789/18823
https://dspace.unl.edu.ec//handle/123456789/18833
https://dspace.unl.edu.ec//handle/123456789/18811
https://dspace.unl.edu.ec//handle/123456789/18815
https://dspace.unl.edu.ec//handle/123456789/18830
https://dspace.unl.edu.ec//handle/123456789/6511
https://dspace.unl.edu.ec//handle/123456789/18847
https://dspace.unl.edu.ec//handle/123456789/18827
https://dspace.unl.edu.ec//handle/123456789/18842
https://dspace.unl.edu.ec//handle/123456789/18864
https://dspace.unl.edu.ec//handle/123456789/18854
https://dspace.unl.edu.ec//handle/123456789/18837
https://dspace.unl.edu.ec//handle/123456789/18845
https://dspace.unl.edu.ec//handle/123456789/18863
https://dspace.unl.edu.ec//handle/123456789/18850
https://dspace.unl.edu.ec//handle/123456789/18852
https://dspace.unl.edu.ec//handle/123456789/18856
https://dspace.unl.edu.ec//handle/123456789/18848
https://dspace.unl.edu.ec//handle/123456789/18843
https://dspace.unl.edu.ec//handle/123456789/14162
https://dspace.unl.edu.ec//handle/123456789/18858
https://dspace.unl.edu.ec//handle/123456789/18867
https://dspace.unl.edu.ec//handle/123456789/18877
https://dspace.unl.edu.ec//handle/123456789/18866
https://dspace.unl.edu.ec//handle/123456789/18860
https://dspace.unl.edu.ec//handle/123456789/18853
https://dspace.unl.edu.ec//handle/123456789/18862
https://dspace.unl.edu.ec//handle/123456789/18821
https://dspace.unl.edu.ec//handle/123456789/18816
https://dspace.unl.edu.ec//handle/123456789/18870
https://dspace.unl.edu.ec//handle/123456789/18865