@article{GDZPPN002205017,
title = {Densities for 3-class ranks in certain cubic extensions.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {374},
year = {1987},
pages = {161-180},
zbl = {0622.12008},
url = {http://dml.mathdoc.fr/item/GDZPPN002205017}
}
Gerth III, Frank. Densities for 3-class ranks in certain cubic extensions.. Journal für die reine und angewandte Mathematik, Tome 374 (1987) pp. 161-180. http://gdmltest.u-ga.fr/item/GDZPPN002205017/