@inproceedings{alexandra1961contributions,
title={Contributions to information theory for abstract alphabets},
author={Alexandra Ionescu Tulcea},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203426067375972},
booktitle={Arkiv for Matematik},
volume={4},
number={2},
pages={235-247},
year={1961},
}
Alexandra Ionescu Tulcea. Contributions to information theory for abstract alphabets. 1961. Vol. 4. In Arkiv for Matematik. pp.235-247. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203426067375972.