@inproceedings{harald1966on,
title={On the intersections between the trajectories of a normal stationary stochastic process and a high level},
author={Harald Cramér},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203436047672057},
booktitle={Arkiv for Matematik},
volume={6},
number={4},
pages={337-349},
year={1966},
}
Harald Cramér. On the intersections between the trajectories of a normal stationary stochastic process and a high level. 1966. Vol. 6. In Arkiv for Matematik. pp.337-349. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203436047672057.