@article{GDZPPN002549972,
title = {On a theorem of B. Barna. (Short Communication).},
journal = {Aequationes mathematicae},
volume = {20},
year = {1980},
pages = {115-115},
url = {http://dml.mathdoc.fr/item/GDZPPN002549972}
}
Kuczma, Marek. On a theorem of B. Barna. (Short Communication).. Aequationes mathematicae, Tome 20 (1980) p. 115. http://gdmltest.u-ga.fr/item/GDZPPN002549972/