@article{bwmeta1.element.bwnjournal-article-fmv138i1p19bwm,
author = {Grzegorz \'Swi\k atek},
title = {Circle homeomorphisms with flat critical points},
journal = {Fundamenta Mathematicae},
volume = {138},
year = {1991},
pages = {205-217},
zbl = {0743.58010},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv138i1p19bwm}
}
Świątek, Grzegorz. Circle homeomorphisms with flat critical points. Fundamenta Mathematicae, Tome 138 (1991) pp. 205-217. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv138i1p19bwm/