Sabin Fernández Kepa Mayora Jon Basurko Javier Gómez-Elvira Ricardo García Carlos González Javier Selaya 399-409 1997 conf/iser/1997 ISER db/conf/iser/iser1997.html#FernandezMBGGGS97 https://doi.org/10.1007/BFb0112979