@article{10_4064_cm_49_1_109_115,
     author = {M. Laczkovich},
     title = {On {Kemperman's} inequality 2f(x)\ensuremath{\leq} f(x+h)+f(x+2h)},
     journal = {Colloquium Mathematicum},
     pages = {109--115},
     publisher = {mathdoc},
     volume = {49},
     number = {1},
     year = {1984},
     doi = {10.4064/cm-49-1-109-115},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-49-1-109-115/}
}