@article{1181071746,
author = {Dofs, Erik},
title = {Unsolvable Cases of $P^3+Q^3+cR^3=dPQR$},
journal = {Rocky Mountain J. Math.},
volume = {28},
number = {4},
year = {1998},
pages = { 927-938},
language = {en},
url = {http://dml.mathdoc.fr/item/1181071746}
}
Dofs, Erik. Unsolvable Cases of $P^3+Q^3+cR^3=dPQR$. Rocky Mountain J. Math., Tome 28 (1998) no. 4, pp. 927-938. http://gdmltest.u-ga.fr/item/1181071746/