@inproceedings{j.1975un,
title={Un problème de cohomologie relative},
author={J. Vey},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203459947733261},
booktitle={Arkiv for Matematik},
volume={15},
number={1},
pages={21-31},
year={1975},
}