@inproceedings{bo1967pure,
title={Pure submodules},
author={Bo T. Stenström},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203438439769077},
booktitle={Arkiv for Matematik},
volume={7},
number={2},
pages={159-171},
year={1967},
}