@article{COMIM_1998_6_1_a12,
     author = {Jakubec, Stanislav},
     title = {Note on the congruences $2^{p-1}\equiv 1\pmod {p^2}$, $3^{p-1}\equiv 1\pmod {p^2}$, $5^{p-1}\equiv 1\pmod {p^2}$},
     journal = {Communications in Mathematics},
     pages = {115--120},
     year = {1998},
     volume = {6},
     number = {1},
     mrnumber = {1822520},
     zbl = {1024.11002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/COMIM_1998_6_1_a12/}
}