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@article{AM2_1987__32_137175, author = {Kazimierz Nikodem}, title = {Midpoint convex functions majorized by midpoint concave functions.}, journal = {Aequationes mathematicae}, pages = {45--51}, publisher = {mathdoc}, volume = {32}, year = {1987}, zbl = {0612.26007}, url = {http://geodesic.mathdoc.fr/item/AM2_1987__32_137175/} }
Kazimierz Nikodem. Midpoint convex functions majorized by midpoint concave functions.. Aequationes mathematicae, Tome 32 (1987), pp. 45-51. http://geodesic.mathdoc.fr/item/AM2_1987__32_137175/