@article{02246454,
title = {Generalized Lagrange criteria for certain quadratic Diophantine equations.},
journal = {The New York Journal of Mathematics [electronic only]},
volume = {11},
year = {2005},
pages = {539-545},
zbl = {1161.11321},
language = {en},
url = {http://dml.mathdoc.fr/item/02246454}
}
Mollin, R.A. Generalized Lagrange criteria for certain quadratic Diophantine equations.. The New York Journal of Mathematics [electronic only], Tome 11 (2005) pp. 539-545. http://gdmltest.u-ga.fr/item/02246454/