@inproceedings{stefan1998on,
title={On weighted positivity and the Wiener regularity of a boundary point for the fractional Laplacian},
author={Stefan Eilertsen},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203557965409739},
booktitle={Arkiv for Matematik},
volume={38},
number={1},
pages={53-75},
year={1998},
}
Stefan Eilertsen. On weighted positivity and the Wiener regularity of a boundary point for the fractional Laplacian. 1998. Vol. 38. In Arkiv for Matematik. pp.53-75. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203557965409739.