@article{GDZPPN002035782,
title = {The Feigenbaum functional equation and periodic points.},
journal = {Aequationes mathematicae},
volume = {30},
year = {1986},
pages = {202-207},
zbl = {0593.39001},
url = {http://dml.mathdoc.fr/item/GDZPPN002035782}
}
Fischer, P. The Feigenbaum functional equation and periodic points.. Aequationes mathematicae, Tome 30 (1986) pp. 202-207. http://gdmltest.u-ga.fr/item/GDZPPN002035782/