@inproceedings{idrisse2008surfaces,
title={Surfaces Isotropes ET Systems Integrables},
author={Idrisse Khemar},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160909134513161866732},
booktitle={Journal of Differential Geometry},
volume={79},
number={3},
pages={479-516},
year={2008},
}