%0 Journal Article %A Ken-Ichi Sato %T A remark on the criteria for3 to be a ninth power (mod p). %J Mathematica Scandinavica %D 1987 %P 148-150 %V 60 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1987__60_167014/ %F MS2_1987__60_167014