@article{GDZPPN000364479, title = {A Combinatorial Property of Points and Ellipsoids.}, journal = {Discrete \& computational geometry}, volume = {5}, year = {1990}, pages = {375-382}, zbl = {0697.52005}, url = {http://dml.mathdoc.fr/item/GDZPPN000364479} }
Larman, D.G.; Bàràny, I. A Combinatorial Property of Points and Ellipsoids.. Discrete & computational geometry, Tome 5 (1990) pp. 375-382. http://gdmltest.u-ga.fr/item/GDZPPN000364479/