@article{GDZPPN002190680,
title = {Unit signatures, and even class numbers, and relative class numbers.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {272},
year = {1975},
pages = {376-384},
zbl = {0312.12015},
url = {http://dml.mathdoc.fr/item/GDZPPN002190680}
}
Garbanati, Dennis A. Unit signatures, and even class numbers, and relative class numbers.. Journal für die reine und angewandte Mathematik, Tome 272 (1975) pp. 376-384. http://gdmltest.u-ga.fr/item/GDZPPN002190680/