@article{1183498790, author = {Brauer, Richard}, title = {A characterization of null systems in projective space}, journal = {Bull. Amer. Math. Soc.}, volume = {42}, number = {12}, year = {1936}, pages = { 247-254}, language = {en}, url = {http://dml.mathdoc.fr/item/1183498790} }
Brauer, Richard. A characterization of null systems in projective space. Bull. Amer. Math. Soc., Tome 42 (1936) no. 12, pp. 247-254. http://gdmltest.u-ga.fr/item/1183498790/