TY  - JOUR
AU  - L. Anczyk
TI  - On differentiable solutions of Böttcher's functional equation
JO  - Annales Polonici Mathematici
PY  - 1968
SP  - 217
EP  - 221
VL  - 21
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-21-2-217-221/
DO  - 10.4064/ap-21-2-217-221
LA  - en
ID  - 10_4064_ap_21_2_217_221
ER  -