@article{1177731646,
author = {Beckenbach, E. F.},
title = {Convexity Properties of Generalized Mean Value Functions},
journal = {Ann. Math. Statist.},
volume = {13},
number = {4},
year = {1942},
pages = { 88-90},
language = {en},
url = {http://dml.mathdoc.fr/item/1177731646}
}
Beckenbach, E. F. Convexity Properties of Generalized Mean Value Functions. Ann. Math. Statist., Tome 13 (1942) no. 4, pp. 88-90. http://gdmltest.u-ga.fr/item/1177731646/