@inproceedings{ricardo1995fixed,
title={Fixed points and circle maps},
author={Ricardo Pérez-Marco},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203330134836554},
booktitle={Acta Mathematica},
volume={179},
number={2},
pages={243-294},
year={1995},
}