@article{GDZPPN002033771,
title = {Analytic solutions of B\"ottcher's functional equation in the unit disk.},
journal = {Aequationes mathematicae},
volume = {25},
year = {1982},
pages = {187-194},
zbl = {0526.30033},
url = {http://dml.mathdoc.fr/item/GDZPPN002033771}
}
Cowen, Carl C. Analytic solutions of Böttcher's functional equation in the unit disk.. Aequationes mathematicae, Tome 25 (1982) pp. 187-194. http://gdmltest.u-ga.fr/item/GDZPPN002033771/