@inproceedings{leon1976a,
title={A Hölder estimate for quasiconformal maps between surfaces in Euclidean space},
author={Leon Simon},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203243013782223},
booktitle={Acta Mathematica},
volume={139},
number={1},
pages={19-51},
year={1976},
}
Leon Simon. A Hölder estimate for quasiconformal maps between surfaces in Euclidean space. 1976. Vol. 139. In Acta Mathematica. pp.19-51. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203243013782223.