@article{GDZPPN002195720,
title = {On the diophantine equation 27 y2 + 4 x3 = D.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {310},
year = {1979},
pages = {134-135},
zbl = {0392.10019},
url = {http://dml.mathdoc.fr/item/GDZPPN002195720}
}
Udrescu, Valeriu St. On the diophantine equation 27 y2 + 4 x3 = D.. Journal für die reine und angewandte Mathematik, Tome 310 (1979) pp. 134-135. http://gdmltest.u-ga.fr/item/GDZPPN002195720/