http://addi.ehu.es/handle/10810/58524
http://addi.ehu.es/handle/10810/66535
http://addi.ehu.es/handle/10810/58294
http://addi.ehu.es/handle/10810/62570
http://addi.ehu.es/handle/10810/67942
http://addi.ehu.es/handle/10810/64363
http://addi.ehu.es/handle/10810/66059
http://addi.ehu.es/handle/10810/68555
http://addi.ehu.es/handle/10810/67719
http://addi.ehu.es/handle/10810/69451
http://addi.ehu.es/handle/10810/57321
http://addi.ehu.es/handle/10810/69714
http://addi.ehu.es/handle/10810/66290
http://addi.ehu.es/handle/10810/63085
http://addi.ehu.es/handle/10810/64804
http://addi.ehu.es/handle/10810/63674
http://addi.ehu.es/handle/10810/69332
http://addi.ehu.es/handle/10810/64714
http://addi.ehu.es/handle/10810/60567
http://addi.ehu.es/handle/10810/57804
http://addi.ehu.es/handle/10810/58881
http://addi.ehu.es/handle/10810/68141
http://addi.ehu.es/handle/10810/62817
http://addi.ehu.es/handle/10810/67876
http://addi.ehu.es/handle/10810/57498
http://addi.ehu.es/handle/10810/60359
http://addi.ehu.es/handle/10810/64479
http://addi.ehu.es/handle/10810/65929
http://addi.ehu.es/handle/10810/67157
http://addi.ehu.es/handle/10810/60497
http://addi.ehu.es/handle/10810/64038
http://addi.ehu.es/handle/10810/65404
http://addi.ehu.es/handle/10810/66961
http://addi.ehu.es/handle/10810/63925
http://addi.ehu.es/handle/10810/58096
http://addi.ehu.es/handle/10810/57615
http://addi.ehu.es/handle/10810/59624
http://addi.ehu.es/handle/10810/61422
http://addi.ehu.es/handle/10810/62494
http://addi.ehu.es/handle/10810/59781
http://addi.ehu.es/handle/10810/58875
http://addi.ehu.es/handle/10810/61606
http://addi.ehu.es/handle/10810/59082
http://addi.ehu.es/handle/10810/59904
http://addi.ehu.es/handle/10810/66154
http://addi.ehu.es/handle/10810/57966
http://addi.ehu.es/handle/10810/67024
http://addi.ehu.es/handle/10810/69719
http://addi.ehu.es/handle/10810/57958
http://addi.ehu.es/handle/10810/66555
http://addi.ehu.es/handle/10810/58198
http://addi.ehu.es/handle/10810/64587
http://addi.ehu.es/handle/10810/65540
http://addi.ehu.es/handle/10810/68024
http://addi.ehu.es/handle/10810/67661
http://addi.ehu.es/handle/10810/65468
http://addi.ehu.es/handle/10810/68337
http://addi.ehu.es/handle/10810/59456
http://addi.ehu.es/handle/10810/66731
http://addi.ehu.es/handle/10810/57301
http://addi.ehu.es/handle/10810/65434
http://addi.ehu.es/handle/10810/63985
http://addi.ehu.es/handle/10810/61863
http://addi.ehu.es/handle/10810/70347
http://addi.ehu.es/handle/10810/62564
http://addi.ehu.es/handle/10810/62451
http://addi.ehu.es/handle/10810/61773
http://addi.ehu.es/handle/10810/69552
http://addi.ehu.es/handle/10810/60979
http://addi.ehu.es/handle/10810/70031
http://addi.ehu.es/handle/10810/65466
http://addi.ehu.es/handle/10810/69723
http://addi.ehu.es/handle/10810/64726
http://addi.ehu.es/handle/10810/60562
http://addi.ehu.es/handle/10810/62236
http://addi.ehu.es/handle/10810/57372
http://addi.ehu.es/handle/10810/69417
http://addi.ehu.es/handle/10810/62354
http://addi.ehu.es/handle/10810/63620
http://addi.ehu.es/handle/10810/58798
http://addi.ehu.es/handle/10810/59680
http://addi.ehu.es/handle/10810/69252
http://addi.ehu.es/handle/10810/65563
http://addi.ehu.es/handle/10810/69551
http://addi.ehu.es/handle/10810/57334
http://addi.ehu.es/handle/10810/67466
http://addi.ehu.es/handle/10810/59329
http://addi.ehu.es/handle/10810/62325
http://addi.ehu.es/handle/10810/64748
http://addi.ehu.es/handle/10810/65618
http://addi.ehu.es/handle/10810/61085
http://addi.ehu.es/handle/10810/67236
http://addi.ehu.es/handle/10810/68911
http://addi.ehu.es/handle/10810/66436
http://addi.ehu.es/handle/10810/59671
http://addi.ehu.es/handle/10810/65754
http://addi.ehu.es/handle/10810/70095
http://addi.ehu.es/handle/10810/59527
http://addi.ehu.es/handle/10810/65417
http://addi.ehu.es/handle/10810/57707
http://addi.ehu.es/handle/10810/64641
http://addi.ehu.es/handle/10810/68306
http://addi.ehu.es/handle/10810/57492
http://addi.ehu.es/handle/10810/63386
http://addi.ehu.es/handle/10810/58482
http://addi.ehu.es/handle/10810/69586
http://addi.ehu.es/handle/10810/61580
http://addi.ehu.es/handle/10810/69502
http://addi.ehu.es/handle/10810/64237
http://addi.ehu.es/handle/10810/70448
http://addi.ehu.es/handle/10810/65428
http://addi.ehu.es/handle/10810/67300
http://addi.ehu.es/handle/10810/66585
http://addi.ehu.es/handle/10810/62385
http://addi.ehu.es/handle/10810/60751
http://addi.ehu.es/handle/10810/57783
http://addi.ehu.es/handle/10810/61043
http://addi.ehu.es/handle/10810/67760
http://addi.ehu.es/handle/10810/65999
http://addi.ehu.es/handle/10810/64341
http://addi.ehu.es/handle/10810/58551
http://addi.ehu.es/handle/10810/67045
http://addi.ehu.es/handle/10810/61776
http://addi.ehu.es/handle/10810/64983
http://addi.ehu.es/handle/10810/58959
http://addi.ehu.es/handle/10810/66807
http://addi.ehu.es/handle/10810/64845
http://addi.ehu.es/handle/10810/64509
http://addi.ehu.es/handle/10810/57325
http://addi.ehu.es/handle/10810/62331
http://addi.ehu.es/handle/10810/66586
http://addi.ehu.es/handle/10810/68914
http://addi.ehu.es/handle/10810/65674
http://addi.ehu.es/handle/10810/58112
http://addi.ehu.es/handle/10810/67502
http://addi.ehu.es/handle/10810/61336
http://addi.ehu.es/handle/10810/63374
http://addi.ehu.es/handle/10810/57455
http://addi.ehu.es/handle/10810/67985
http://addi.ehu.es/handle/10810/66431
http://addi.ehu.es/handle/10810/66392
http://addi.ehu.es/handle/10810/65502
http://addi.ehu.es/handle/10810/58408
http://addi.ehu.es/handle/10810/64853
http://addi.ehu.es/handle/10810/61808
http://addi.ehu.es/handle/10810/57906
http://addi.ehu.es/handle/10810/64689
http://addi.ehu.es/handle/10810/67085
http://addi.ehu.es/handle/10810/70015
http://addi.ehu.es/handle/10810/58816
http://addi.ehu.es/handle/10810/67159
http://addi.ehu.es/handle/10810/57223
http://addi.ehu.es/handle/10810/69206
http://addi.ehu.es/handle/10810/65357
http://addi.ehu.es/handle/10810/70221
http://addi.ehu.es/handle/10810/57416
http://addi.ehu.es/handle/10810/62196
http://addi.ehu.es/handle/10810/59396
http://addi.ehu.es/handle/10810/67469
http://addi.ehu.es/handle/10810/67715
http://addi.ehu.es/handle/10810/61830
http://addi.ehu.es/handle/10810/59707
http://addi.ehu.es/handle/10810/60937
http://addi.ehu.es/handle/10810/57232
http://addi.ehu.es/handle/10810/68687
http://addi.ehu.es/handle/10810/67986
http://addi.ehu.es/handle/10810/60503
http://addi.ehu.es/handle/10810/65460
http://addi.ehu.es/handle/10810/68535
http://addi.ehu.es/handle/10810/61159
http://addi.ehu.es/handle/10810/69604
http://addi.ehu.es/handle/10810/58071
http://addi.ehu.es/handle/10810/65997
http://addi.ehu.es/handle/10810/58160
http://addi.ehu.es/handle/10810/60617
http://addi.ehu.es/handle/10810/58930
http://addi.ehu.es/handle/10810/58309
http://addi.ehu.es/handle/10810/62587
http://addi.ehu.es/handle/10810/68042
http://addi.ehu.es/handle/10810/61689
http://addi.ehu.es/handle/10810/58797
http://addi.ehu.es/handle/10810/66476
http://addi.ehu.es/handle/10810/69074
http://addi.ehu.es/handle/10810/65601
http://addi.ehu.es/handle/10810/68138
http://addi.ehu.es/handle/10810/68582
http://addi.ehu.es/handle/10810/68865
http://addi.ehu.es/handle/10810/67448
http://addi.ehu.es/handle/10810/68791
http://addi.ehu.es/handle/10810/57883
http://addi.ehu.es/handle/10810/63634
http://addi.ehu.es/handle/10810/67665
http://addi.ehu.es/handle/10810/58317
http://addi.ehu.es/handle/10810/64619
http://addi.ehu.es/handle/10810/70339
http://addi.ehu.es/handle/10810/64372
http://addi.ehu.es/handle/10810/66156
http://addi.ehu.es/handle/10810/59881
http://addi.ehu.es/handle/10810/64441
http://addi.ehu.es/handle/10810/57445
http://addi.ehu.es/handle/10810/60848
http://addi.ehu.es/handle/10810/58465
http://addi.ehu.es/handle/10810/63541
http://addi.ehu.es/handle/10810/61285
http://addi.ehu.es/handle/10810/68405
http://addi.ehu.es/handle/10810/68856
http://addi.ehu.es/handle/10810/63940
http://addi.ehu.es/handle/10810/67344
http://addi.ehu.es/handle/10810/67038
http://addi.ehu.es/handle/10810/67295
http://addi.ehu.es/handle/10810/63850
http://addi.ehu.es/handle/10810/67960
http://addi.ehu.es/handle/10810/65790
http://addi.ehu.es/handle/10810/68839
http://addi.ehu.es/handle/10810/60192
http://addi.ehu.es/handle/10810/59176
http://addi.ehu.es/handle/10810/57157
http://addi.ehu.es/handle/10810/68576
http://addi.ehu.es/handle/10810/59812
http://addi.ehu.es/handle/10810/66634
http://addi.ehu.es/handle/10810/59181
http://addi.ehu.es/handle/10810/64992
http://addi.ehu.es/handle/10810/62558
http://addi.ehu.es/handle/10810/60669
http://addi.ehu.es/handle/10810/69870
http://addi.ehu.es/handle/10810/64282
http://addi.ehu.es/handle/10810/63296
http://addi.ehu.es/handle/10810/59997
http://addi.ehu.es/handle/10810/64749
http://addi.ehu.es/handle/10810/61390
http://addi.ehu.es/handle/10810/63557
http://addi.ehu.es/handle/10810/66480
http://addi.ehu.es/handle/10810/63029
http://addi.ehu.es/handle/10810/59740
http://addi.ehu.es/handle/10810/68522
http://addi.ehu.es/handle/10810/61963
http://addi.ehu.es/handle/10810/68502
http://addi.ehu.es/handle/10810/60995
http://addi.ehu.es/handle/10810/67931
http://addi.ehu.es/handle/10810/59764
http://addi.ehu.es/handle/10810/59823
http://addi.ehu.es/handle/10810/62798
http://addi.ehu.es/handle/10810/60612
http://addi.ehu.es/handle/10810/62568
http://addi.ehu.es/handle/10810/69196
http://addi.ehu.es/handle/10810/63402
http://addi.ehu.es/handle/10810/60942
http://addi.ehu.es/handle/10810/69683
http://addi.ehu.es/handle/10810/65961
http://addi.ehu.es/handle/10810/68331
http://addi.ehu.es/handle/10810/69458
http://addi.ehu.es/handle/10810/59934
http://addi.ehu.es/handle/10810/67192
http://addi.ehu.es/handle/10810/62767
http://addi.ehu.es/handle/10810/57919
http://addi.ehu.es/handle/10810/64453
http://addi.ehu.es/handle/10810/58654
http://addi.ehu.es/handle/10810/64075
http://addi.ehu.es/handle/10810/62529
http://addi.ehu.es/handle/10810/58837
http://addi.ehu.es/handle/10810/60926
http://addi.ehu.es/handle/10810/64603
http://addi.ehu.es/handle/10810/58664
http://addi.ehu.es/handle/10810/64033
http://addi.ehu.es/handle/10810/66948
http://addi.ehu.es/handle/10810/63413
http://addi.ehu.es/handle/10810/60145
http://addi.ehu.es/handle/10810/68117
http://addi.ehu.es/handle/10810/68219
http://addi.ehu.es/handle/10810/64942
http://addi.ehu.es/handle/10810/64093
http://addi.ehu.es/handle/10810/58676
http://addi.ehu.es/handle/10810/66395
http://addi.ehu.es/handle/10810/69959
http://addi.ehu.es/handle/10810/66808
http://addi.ehu.es/handle/10810/65853
http://addi.ehu.es/handle/10810/68158
http://addi.ehu.es/handle/10810/66865
http://addi.ehu.es/handle/10810/67849
http://addi.ehu.es/handle/10810/63683
http://addi.ehu.es/handle/10810/65192
http://addi.ehu.es/handle/10810/68708
http://addi.ehu.es/handle/10810/64596
http://addi.ehu.es/handle/10810/58013
http://addi.ehu.es/handle/10810/57044
http://addi.ehu.es/handle/10810/61540
http://addi.ehu.es/handle/10810/62863
http://addi.ehu.es/handle/10810/66740
http://addi.ehu.es/handle/10810/61897
http://addi.ehu.es/handle/10810/66433
http://addi.ehu.es/handle/10810/61320
http://addi.ehu.es/handle/10810/62588
http://addi.ehu.es/handle/10810/68825
http://addi.ehu.es/handle/10810/68647
http://addi.ehu.es/handle/10810/62480
http://addi.ehu.es/handle/10810/67501
http://addi.ehu.es/handle/10810/62669
http://addi.ehu.es/handle/10810/64182
http://addi.ehu.es/handle/10810/69061
http://addi.ehu.es/handle/10810/59416
http://addi.ehu.es/handle/10810/63658
http://addi.ehu.es/handle/10810/58775
http://addi.ehu.es/handle/10810/64354
http://addi.ehu.es/handle/10810/63995
http://addi.ehu.es/handle/10810/63353
http://addi.ehu.es/handle/10810/70139
http://addi.ehu.es/handle/10810/67105
http://addi.ehu.es/handle/10810/69426
http://addi.ehu.es/handle/10810/69283
http://addi.ehu.es/handle/10810/59625
http://addi.ehu.es/handle/10810/69807
http://addi.ehu.es/handle/10810/65301
http://addi.ehu.es/handle/10810/59558
http://addi.ehu.es/handle/10810/57953
http://addi.ehu.es/handle/10810/60286
http://addi.ehu.es/handle/10810/64803
http://addi.ehu.es/handle/10810/68660
http://addi.ehu.es/handle/10810/64618
http://addi.ehu.es/handle/10810/63762
http://addi.ehu.es/handle/10810/62454
http://addi.ehu.es/handle/10810/59002
http://addi.ehu.es/handle/10810/67630
http://addi.ehu.es/handle/10810/68182
http://addi.ehu.es/handle/10810/61281
http://addi.ehu.es/handle/10810/68009
http://addi.ehu.es/handle/10810/60042
http://addi.ehu.es/handle/10810/57278
http://addi.ehu.es/handle/10810/63989
http://addi.ehu.es/handle/10810/64339
http://addi.ehu.es/handle/10810/67229
http://addi.ehu.es/handle/10810/64132
http://addi.ehu.es/handle/10810/60151
http://addi.ehu.es/handle/10810/66285
http://addi.ehu.es/handle/10810/70228
http://addi.ehu.es/handle/10810/61691
http://addi.ehu.es/handle/10810/60922
http://addi.ehu.es/handle/10810/61640
http://addi.ehu.es/handle/10810/68597
http://addi.ehu.es/handle/10810/60255
http://addi.ehu.es/handle/10810/59990
http://addi.ehu.es/handle/10810/59108
http://addi.ehu.es/handle/10810/60040
http://addi.ehu.es/handle/10810/57166
http://addi.ehu.es/handle/10810/68467
http://addi.ehu.es/handle/10810/64270
http://addi.ehu.es/handle/10810/60227
http://addi.ehu.es/handle/10810/64681
http://addi.ehu.es/handle/10810/58479
http://addi.ehu.es/handle/10810/67814
http://addi.ehu.es/handle/10810/66714
http://addi.ehu.es/handle/10810/63241
http://addi.ehu.es/handle/10810/63993
http://addi.ehu.es/handle/10810/61564
http://addi.ehu.es/handle/10810/68618
http://addi.ehu.es/handle/10810/66779
http://addi.ehu.es/handle/10810/64552
http://addi.ehu.es/handle/10810/61772
http://addi.ehu.es/handle/10810/60783
http://addi.ehu.es/handle/10810/59645
http://addi.ehu.es/handle/10810/57666
http://addi.ehu.es/handle/10810/69387
http://addi.ehu.es/handle/10810/62805
http://addi.ehu.es/handle/10810/62298
http://addi.ehu.es/handle/10810/58905
http://addi.ehu.es/handle/10810/61855
http://addi.ehu.es/handle/10810/69406
http://addi.ehu.es/handle/10810/61138
http://addi.ehu.es/handle/10810/62598
http://addi.ehu.es/handle/10810/60224
http://addi.ehu.es/handle/10810/61214
http://addi.ehu.es/handle/10810/65546
http://addi.ehu.es/handle/10810/59050
http://addi.ehu.es/handle/10810/69540
http://addi.ehu.es/handle/10810/64366
http://addi.ehu.es/handle/10810/61799
http://addi.ehu.es/handle/10810/63345
http://addi.ehu.es/handle/10810/63089
http://addi.ehu.es/handle/10810/58272
http://addi.ehu.es/handle/10810/65987
http://addi.ehu.es/handle/10810/64422
http://addi.ehu.es/handle/10810/67378
http://addi.ehu.es/handle/10810/63869
http://addi.ehu.es/handle/10810/57121
http://addi.ehu.es/handle/10810/67854
http://addi.ehu.es/handle/10810/68592
http://addi.ehu.es/handle/10810/61708
http://addi.ehu.es/handle/10810/60977
http://addi.ehu.es/handle/10810/59863
http://addi.ehu.es/handle/10810/69710
http://addi.ehu.es/handle/10810/63724
http://addi.ehu.es/handle/10810/61929
http://addi.ehu.es/handle/10810/70265
http://addi.ehu.es/handle/10810/57485
http://addi.ehu.es/handle/10810/63939
http://addi.ehu.es/handle/10810/68516
http://addi.ehu.es/handle/10810/66632
http://addi.ehu.es/handle/10810/61554
http://addi.ehu.es/handle/10810/58150
http://addi.ehu.es/handle/10810/59899
http://addi.ehu.es/handle/10810/57863
http://addi.ehu.es/handle/10810/70142
http://addi.ehu.es/handle/10810/58931
http://addi.ehu.es/handle/10810/64105
http://addi.ehu.es/handle/10810/63920
http://addi.ehu.es/handle/10810/60416
http://addi.ehu.es/handle/10810/70396
http://addi.ehu.es/handle/10810/58541
http://addi.ehu.es/handle/10810/57346
http://addi.ehu.es/handle/10810/57629
http://addi.ehu.es/handle/10810/68787
http://addi.ehu.es/handle/10810/67322
http://addi.ehu.es/handle/10810/59006
http://addi.ehu.es/handle/10810/61686
http://addi.ehu.es/handle/10810/67302
http://addi.ehu.es/handle/10810/59561
http://addi.ehu.es/handle/10810/61770
http://addi.ehu.es/handle/10810/61994
http://addi.ehu.es/handle/10810/59454
http://addi.ehu.es/handle/10810/69611
http://addi.ehu.es/handle/10810/68389
http://addi.ehu.es/handle/10810/64647
http://addi.ehu.es/handle/10810/66288
http://addi.ehu.es/handle/10810/59890
http://addi.ehu.es/handle/10810/69763
http://addi.ehu.es/handle/10810/57951
http://addi.ehu.es/handle/10810/70118
http://addi.ehu.es/handle/10810/66707
http://addi.ehu.es/handle/10810/57307
http://addi.ehu.es/handle/10810/64380
http://addi.ehu.es/handle/10810/59751
http://addi.ehu.es/handle/10810/61292
http://addi.ehu.es/handle/10810/60716
http://addi.ehu.es/handle/10810/67862
http://addi.ehu.es/handle/10810/59012
http://addi.ehu.es/handle/10810/68691
http://addi.ehu.es/handle/10810/65121
http://addi.ehu.es/handle/10810/65791
http://addi.ehu.es/handle/10810/60653
http://addi.ehu.es/handle/10810/69045
http://addi.ehu.es/handle/10810/63835
http://addi.ehu.es/handle/10810/67158
http://addi.ehu.es/handle/10810/57202
http://addi.ehu.es/handle/10810/70010
http://addi.ehu.es/handle/10810/65663
http://addi.ehu.es/handle/10810/60894
http://addi.ehu.es/handle/10810/61488
http://addi.ehu.es/handle/10810/64568
http://addi.ehu.es/handle/10810/61127
http://addi.ehu.es/handle/10810/60364
http://addi.ehu.es/handle/10810/68979
http://addi.ehu.es/handle/10810/68837
http://addi.ehu.es/handle/10810/63470
http://addi.ehu.es/handle/10810/58535
http://addi.ehu.es/handle/10810/67928
http://addi.ehu.es/handle/10810/62448
http://addi.ehu.es/handle/10810/69783
http://addi.ehu.es/handle/10810/67848
http://addi.ehu.es/handle/10810/60267
http://addi.ehu.es/handle/10810/58674
http://addi.ehu.es/handle/10810/60837
http://addi.ehu.es/handle/10810/61847
http://addi.ehu.es/handle/10810/60448
http://addi.ehu.es/handle/10810/62542
http://addi.ehu.es/handle/10810/57226
http://addi.ehu.es/handle/10810/68988
http://addi.ehu.es/handle/10810/61683
http://addi.ehu.es/handle/10810/68889
http://addi.ehu.es/handle/10810/61283
http://addi.ehu.es/handle/10810/59099
http://addi.ehu.es/handle/10810/62411
http://addi.ehu.es/handle/10810/65321
http://addi.ehu.es/handle/10810/58301
http://addi.ehu.es/handle/10810/60695
http://addi.ehu.es/handle/10810/69736
http://addi.ehu.es/handle/10810/69392
http://addi.ehu.es/handle/10810/61090
http://addi.ehu.es/handle/10810/57811
http://addi.ehu.es/handle/10810/61672
http://addi.ehu.es/handle/10810/67677
http://addi.ehu.es/handle/10810/62786
http://addi.ehu.es/handle/10810/67298
http://addi.ehu.es/handle/10810/66719
http://addi.ehu.es/handle/10810/57126
http://addi.ehu.es/handle/10810/64661
http://addi.ehu.es/handle/10810/59055
http://addi.ehu.es/handle/10810/58396
http://addi.ehu.es/handle/10810/57283
http://addi.ehu.es/handle/10810/65684
http://addi.ehu.es/handle/10810/59799
http://addi.ehu.es/handle/10810/67742
http://addi.ehu.es/handle/10810/65586
http://addi.ehu.es/handle/10810/61471
http://addi.ehu.es/handle/10810/66916
http://addi.ehu.es/handle/10810/60327
http://addi.ehu.es/handle/10810/58786
http://addi.ehu.es/handle/10810/58014
http://addi.ehu.es/handle/10810/70423
http://addi.ehu.es/handle/10810/58321
http://addi.ehu.es/handle/10810/58972
http://addi.ehu.es/handle/10810/61494
http://addi.ehu.es/handle/10810/58640
http://addi.ehu.es/handle/10810/57639
http://addi.ehu.es/handle/10810/62017
http://addi.ehu.es/handle/10810/68699
http://addi.ehu.es/handle/10810/58776
http://addi.ehu.es/handle/10810/58172
http://addi.ehu.es/handle/10810/69055
http://addi.ehu.es/handle/10810/68080
http://addi.ehu.es/handle/10810/59957
http://addi.ehu.es/handle/10810/63775
http://addi.ehu.es/handle/10810/60609
http://addi.ehu.es/handle/10810/57355
http://addi.ehu.es/handle/10810/69486
http://addi.ehu.es/handle/10810/64591
http://addi.ehu.es/handle/10810/60935