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@article{JRAM_1976__288_151799, author = {Ezra Brown}, title = {The diophantine equation x2 + 3 = 7n.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {74--76}, publisher = {mathdoc}, volume = {288}, year = {1976}, zbl = {0333.10006}, url = {http://geodesic.mathdoc.fr/item/JRAM_1976__288_151799/} }
Ezra Brown. The diophantine equation x2 + 3 = 7n.. Journal für die reine und angewandte Mathematik, Tome 288 (1976), pp. 74-76. http://geodesic.mathdoc.fr/item/JRAM_1976__288_151799/