@inproceedings{daniel2013extremal,
title={Extremal functions for real convex bodies},
author={Daniel M. Burns, Norman Levenberg, and Sione Ma‘u},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203640388500082},
booktitle={Arkiv for Matematik},
volume={53},
number={2},
pages={203-236},
year={2013},
}

Daniel M. Burns, Norman Levenberg, and Sione Ma‘u. Extremal functions for real convex bodies. 2013. Vol. 53. In Arkiv for Matematik. pp.203-236. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203640388500082.