@inproceedings{harald1961on,
title={On the structure of purely non-deterministic stochastic processes},
author={Harald Cramér},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203426204978973},
booktitle={Arkiv for Matematik},
volume={4},
number={2},
pages={249-266},
year={1961},
}
Harald Cramér. On the structure of purely non-deterministic stochastic processes. 1961. Vol. 4. In Arkiv for Matematik. pp.249-266. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203426204978973.