@article{GDZPPN00239412X, title = {On the minimal points of perfect quadratic forms.}, journal = {Mathematische Zeitschrift}, volume = {85}, year = {1964}, pages = {228-232}, zbl = {0124.27601}, url = {http://dml.mathdoc.fr/item/GDZPPN00239412X} }
Rankin, R.A. On the minimal points of perfect quadratic forms.. Mathematische Zeitschrift, Tome 85 (1964) pp. 228-232. http://gdmltest.u-ga.fr/item/GDZPPN00239412X/