@inproceedings{zheng-xu1996the$c$^{∞}-convergence,
title={The$C$^{∞}-convergence of hexagonal disk packings to the Riemann map},
author={Zheng-Xu He, and Oded Schramm},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203331123124562},
booktitle={Acta Mathematica},
volume={180},
number={2},
pages={219-245},
year={1996},
}
Zheng-Xu He, and Oded Schramm. The$C$^{∞}-convergence of hexagonal disk packings to the Riemann map. 1996. Vol. 180. In Acta Mathematica. pp.219-245. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203331123124562.