@inproceedings{rupert2011uniqueness,
title={Uniqueness of non-linear ground states for fractional Laplacians in $${\mathbb{R}}$$ },
author={Rupert L. Frank, and Enno Lenzmann},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203400823704771},
booktitle={Acta Mathematica},
volume={210},
number={2},
pages={261-318},
year={2011},
}

Rupert L. Frank, and Enno Lenzmann. Uniqueness of non-linear ground states for fractional Laplacians in $${\mathbb{R}}$$ . 2011. Vol. 210. In Acta Mathematica. pp.261-318. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203400823704771.