TY  - JOUR
AU  - Marek Kuczma
TI  - On a theorem of B. Barna. (Short Communication).
JO  - Aequationes mathematicae
PY  - 1980
SP  - 115
EP  - 115
VL  - 20
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1980__20_182387/
ID  - AM2_1980__20_182387
ER  -