TY  - JOUR
AU  - Stefan Czerwik
TI  - Solutions of a system of functional equations in some class functions.
JO  - Aequationes mathematicae
PY  - 1978
SP  - 289
EP  - 295
VL  - 18
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1978__18_136785/
ID  - AM2_1978__18_136785
ER  -