TY - JOUR AU - Stefan Czerwik TI - Solutions of a system of functional equations in some classes of functions. (Short Communication). JO - Aequationes mathematicae PY - 1977 SP - 309 EP - 309 VL - 16 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AM2_1977__16_136703/ ID - AM2_1977__16_136703 ER -