@inproceedings{harald1969convolutions,
title={Convolutions of random functions},
author={Harald Bergström},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203441808086106},
booktitle={Arkiv for Matematik},
volume={7},
number={6},
pages={527-537},
year={1969},
}