@inproceedings{visa2001continuity,
title={Continuity of weak solutions of elliptic partial differential equations},
author={Visa Latvala},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203606216516804},
booktitle={Arkiv for Matematik},
volume={41},
number={1},
pages={95-104},
year={2001},
}

Visa Latvala. Continuity of weak solutions of elliptic partial differential equations. 2001. Vol. 41. In Arkiv for Matematik. pp.95-104. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203606216516804.