%0 Journal Article %A P. Ribenboim %T On the Square Factors of the Numbers of Fermat and Ferentinou-Nicolakopoulou %J Ευκλείδης Γ %D 1988 %P 81-91 %V 20 %I mathdoc %U http://geodesic.mathdoc.fr/item/EUG_1988__20_a7/ %G gr %F EUG_1988__20_a7