@inproceedings{charles1960the,
title={The combinatorial topology of analytic functions of the boundary of a disk},
author={Charles J. Titus},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203157270801923},
booktitle={Acta Mathematica},
volume={106},
number={1},
pages={45-64},
year={1960},
}
Charles J. Titus. The combinatorial topology of analytic functions of the boundary of a disk. 1960. Vol. 106. In Acta Mathematica. pp.45-64. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203157270801923.