@article{JRAM_1987__379_152956,
     author = {William C. Waterhouse},
     title = {Discriminants of etale algebras and related structures.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {209--220},
     publisher = {mathdoc},
     volume = {379},
     year = {1987},
     zbl = {0609.13006},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1987__379_152956/}
}