TY  - JOUR
AU  - S. Czerwik
TI  - Solutions of class \(C^r\) with respect to the parameter of a linear functional equation
JO  - Commentationes Mathematicae
PY  - 1974
SP  -  341
EP  - 345
VL  - 17
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.14708/cm.v17i2.5779/
DO  - 10.14708/cm.v17i2.5779
LA  - pl
ID  - 10_14708_cm_v17i2_5779
ER  -