@inproceedings{e.1887sur,
title={Sur un mode de transformation des surfaces minima},
author={E. Goursat},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108202944151216874},
booktitle={Acta Mathematica},
volume={11},
number={1},
pages={257-264},
year={1887},
}