@article{MS2_1987__60_167014,
     author = {Ken-Ichi Sato},
     title = {A remark on the criteria for3 to be a ninth power (mod p).},
     journal = {Mathematica Scandinavica},
     pages = {148--150},
     publisher = {mathdoc},
     volume = {60},
     year = {1987},
     zbl = {0634.10005},
     url = {http://geodesic.mathdoc.fr/item/MS2_1987__60_167014/}
}