@inproceedings{w.1951sur,
title={Sur la resolution d'un probleme de la theorie des correspondances multivoques abstraites},
author={W. Simonsen},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203130711646726},
booktitle={Acta Mathematica},
volume={84},
number={1},
pages={301-318},
year={1951},
}
W. Simonsen. Sur la resolution d'un probleme de la theorie des correspondances multivoques abstraites. 1951. Vol. 84. In Acta Mathematica. pp.301-318. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203130711646726.