@inproceedings{feng2010simple,
title={SIMPLE LOOPS ON SURFACES AND THEIR INTERSECTION NUMBERS},
author={Feng Luo},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160911214740871341835},
booktitle={Journal of Differential Geometry},
volume={85},
number={1},
pages={73-115},
year={2010},
}

Feng Luo. SIMPLE LOOPS ON SURFACES AND THEIR INTERSECTION NUMBERS. 2010. Vol. 85. In Journal of Differential Geometry. pp.73-115. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160911214740871341835.