TY  - JOUR
AU  - S. Czerwik
TI  - On the differentiability of solutions of a functional equation with respect to a parameter
JO  - Annales Polonici Mathematici
PY  - 1970
SP  - 209
EP  - 217
VL  - 24
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-24-2-209-217/
DO  - 10.4064/ap-24-2-209-217
LA  - en
ID  - 10_4064_ap_24_2_209_217
ER  -