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@article{JRAM_1979__305_152081, author = {Valeriu St. Udrescu}, title = {On the diophantine equation 27 y2 + 4 x3 = {D.}}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {134--135}, publisher = {mathdoc}, volume = {305}, year = {1979}, zbl = {0392.10019}, url = {http://geodesic.mathdoc.fr/item/JRAM_1979__305_152081/} }
Valeriu St. Udrescu. On the diophantine equation 27 y2 + 4 x3 = D.. Journal für die reine und angewandte Mathematik, Tome 305 (1979), pp. 134-135. http://geodesic.mathdoc.fr/item/JRAM_1979__305_152081/