@article{GDZPPN00219256X,
title = {Class numbers of positive definite quaternary quadratic forms.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {281},
year = {1976},
pages = {101-123},
zbl = {0332.10013},
url = {http://dml.mathdoc.fr/item/GDZPPN00219256X}
}
Pizer, Arnold K. Class numbers of positive definite quaternary quadratic forms.. Journal für die reine und angewandte Mathematik, Tome 281 (1976) pp. 101-123. http://gdmltest.u-ga.fr/item/GDZPPN00219256X/