@article{02010122,
title = {About an old problem of Karamata.},
journal = {Publications de l'Institut Math\'ematique. Nouvelle S\'erie},
volume = {71(85)},
year = {2002},
pages = {91-96},
doi = {10.2298/PIM0271091S},
zbl = {1034.41016},
language = {en},
url = {http://dml.mathdoc.fr/item/02010122}
}
Simić, Slavko. About an old problem of Karamata.. Publications de l'Institut Mathématique. Nouvelle Série, Tome 71(85) (2002) pp. 91-96. doi : 10.2298/PIM0271091S. http://gdmltest.u-ga.fr/item/02010122/