%0 Journal Article %A P. Ribenboim %T On the Square Factors of the Numbers of Fermat and Ferentinou-Nicolakopoulou %J Μαθηματική Επιθεώρηση %D 1980 %P 81-91 %V 20 %I mathdoc %U http://geodesic.mathdoc.fr/item/MR_1980__20_a7/ %G gr %F MR_1980__20_a7