@inproceedings{qingyue2008rigidity,
title={Rigidity of the harmonic map heat flow from the sphere to compact Kähler manifolds},
author={Qingyue Liu, and Yunyan Yang},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203626673952973},
booktitle={Arkiv for Matematik},
volume={48},
number={1},
pages={121-130},
year={2008},
}

Qingyue Liu, and Yunyan Yang. Rigidity of the harmonic map heat flow from the sphere to compact Kähler manifolds. 2008. Vol. 48. In Arkiv for Matematik. pp.121-130. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203626673952973.