@article{GDZPPN00203834X,
title = {A functional inequality characterizing convex functions, conjugacy and a generalization of H\"older's and Minkowski's inequalities.},
journal = {Aequationes mathematicae},
volume = {40},
year = {1990},
pages = {168-180},
zbl = {0715.39013},
url = {http://dml.mathdoc.fr/item/GDZPPN00203834X}
}
Matkowski, J. A functional inequality characterizing convex functions, conjugacy and a generalization of Hölder's and Minkowski's inequalities.. Aequationes mathematicae, Tome 40 (1990) pp. 168-180. http://gdmltest.u-ga.fr/item/GDZPPN00203834X/