@inproceedings{bernt1981projection,
title={Projection estimates for harmonic measure},
author={Bernt Øksendal},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203515387686393},
booktitle={Arkiv for Matematik},
volume={21},
number={1},
pages={191-203},
year={1981},
}