@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/}
}