@article{GDZPPN002471698, title = {An Extremal Theorem for N-Simplexes.}, journal = {Monatshefte f\"ur Mathematik}, volume = {59}, year = {1955}, pages = {320-322}, zbl = {0066.14401}, url = {http://dml.mathdoc.fr/item/GDZPPN002471698} }
Petty, C.M.; Waterman, D. An Extremal Theorem for N-Simplexes.. Monatshefte für Mathematik, Tome 59 (1955) pp. 320-322. http://gdmltest.u-ga.fr/item/GDZPPN002471698/