@inproceedings{j.1970distortion,
title={Distortion under conformal and quasiconformal mappings},
author={J. E. McMillan},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203221641659108},
booktitle={Acta Mathematica},
volume={126},
number={1},
pages={121-141},
year={1970},
}