@article{GDZPPN002359251, title = {A remark on the criteria for3 to be a ninth power (mod p).}, journal = {Mathematica Scandinavica}, volume = {61}, year = {1987}, pages = {148-150}, zbl = {0634.10005}, url = {http://dml.mathdoc.fr/item/GDZPPN002359251} }
Sato, Ken-Ichi. A remark on the criteria for3 to be a ninth power (mod p).. Mathematica Scandinavica, Tome 61 (1987) pp. 148-150. http://gdmltest.u-ga.fr/item/GDZPPN002359251/