@article{GDZPPN002204819,
title = {Discriminants of etale algebras and related structures.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {374},
year = {1987},
pages = {209-220},
zbl = {0609.13006},
url = {http://dml.mathdoc.fr/item/GDZPPN002204819}
}
Waterhouse, William C. Discriminants of etale algebras and related structures.. Journal für die reine und angewandte Mathematik, Tome 374 (1987) pp. 209-220. http://gdmltest.u-ga.fr/item/GDZPPN002204819/