%0 Journal Article %A Jakubec, Stanislav %T Note on the congruences $2^{p-1}\equiv 1\pmod {p^2}$, $3^{p-1}\equiv 1\pmod {p^2}$, $5^{p-1}\equiv 1\pmod {p^2}$ %J Communications in Mathematics %D 1998 %P 115-120 %V 06 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/COMIM_1998__6_1_a12/ %G en %F COMIM_1998__6_1_a12