@article{GDZPPN002194570,
title = {Congruence properties of the number of solutions of some equations.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {302},
year = {1978},
pages = {101-103},
zbl = {0366.10019},
url = {http://dml.mathdoc.fr/item/GDZPPN002194570}
}
Chowla, S.; Cowles, J.; Cowles, M. Congruence properties of the number of solutions of some equations.. Journal für die reine und angewandte Mathematik, Tome 302 (1978) pp. 101-103. http://gdmltest.u-ga.fr/item/GDZPPN002194570/