@article{1077375083,
author = {Mordell, L. J.},
title = {On the congruence $ax^3+by^3+cz^3+dxyz \equiv n(\mod p)$},
journal = {Duke Math. J.},
volume = {31},
number = {1},
year = {1964},
pages = { 123-126},
language = {en},
url = {http://dml.mathdoc.fr/item/1077375083}
}
Mordell, L. J. On the congruence $ax^3+by^3+cz^3+dxyz \equiv n(\mod p)$. Duke Math. J., Tome 31 (1964) no. 1, pp. 123-126. http://gdmltest.u-ga.fr/item/1077375083/