@article{1177732433, author = {Norris, Nilan}, title = {Convexity Properties of Generalized Mean Value Functions}, journal = {Ann. Math. Statist.}, volume = {8}, number = {4}, year = {1937}, pages = { 118-120}, language = {en}, url = {http://dml.mathdoc.fr/item/1177732433} }
Norris, Nilan. Convexity Properties of Generalized Mean Value Functions. Ann. Math. Statist., Tome 8 (1937) no. 4, pp. 118-120. http://gdmltest.u-ga.fr/item/1177732433/