@inproceedings{clément2011the,
title={The energy density in the planar Ising model},
author={Clément Hongler, and Stanislav Smirnov},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203401617939778},
booktitle={Acta Mathematica},
volume={211},
number={2},
pages={191-225},
year={2011},
}

Clément Hongler, and Stanislav Smirnov. The energy density in the planar Ising model. 2011. Vol. 211. In Acta Mathematica. pp.191-225. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203401617939778.