@article{1077380273,
author = {Hartman, Philip},
title = {Convex functions and mean value inequalities},
journal = {Duke Math. J.},
volume = {39},
number = {1},
year = {1972},
pages = { 351-360},
language = {en},
url = {http://dml.mathdoc.fr/item/1077380273}
}
Hartman, Philip. Convex functions and mean value inequalities. Duke Math. J., Tome 39 (1972) no. 1, pp. 351-360. http://gdmltest.u-ga.fr/item/1077380273/