@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/