@article{GDZPPN002057131,
title = {An arithmetical property of quadratic forms.},
journal = {Commentarii mathematici Helvetici},
volume = {33},
year = {1959},
pages = {34-37},
zbl = {0082.25803},
url = {http://dml.mathdoc.fr/item/GDZPPN002057131}
}
Ledermann, Walter. An arithmetical property of quadratic forms.. Commentarii mathematici Helvetici, Tome 33 (1959) pp. 34-37. http://gdmltest.u-ga.fr/item/GDZPPN002057131/