TY  - JOUR
AU  - Gy. Petruska
TI  - On a functional equation with retarded mean.
JO  - Aequationes mathematicae
PY  - 1989
SP  - 66
EP  - 72
VL  - 38
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1989__38_1_137316/
ID  - AM2_1989__38_1_137316
ER  -