@article{GDZPPN002374447, title = {The number of solutions of some congruences in two variables.}, journal = {Mathematische Zeitschrift}, volume = {37}, year = {1933}, pages = {193-209}, zbl = {0007.00501}, url = {http://dml.mathdoc.fr/item/GDZPPN002374447} }
Mordell, L.J. The number of solutions of some congruences in two variables.. Mathematische Zeitschrift, Tome 37 (1933) pp. 193-209. http://gdmltest.u-ga.fr/item/GDZPPN002374447/