Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Fortún, Luis Javier and Otatzu Jaurrieta, Segundo",Sancho VII el Fuerte (1194-1234),,Mintzoa,1987,Reyes de Navarra,,8485891341,,https://cir.nii.ac.jp/crid/1130282272263358464