@article{MZ_1964__84_170259,
     author = {R.A. Rankin},
     title = {On the minimal points of perfect quadratic forms.},
     journal = {Mathematische Zeitschrift},
     pages = {228--232},
     year = {1964},
     volume = {84},
     zbl = {0124.27601},
     url = {http://geodesic.mathdoc.fr/item/MZ_1964__84_170259/}
}