@inproceedings{t.1926quelques,
title={Quelques problèmes isopérimétriques},
author={T. Bonnesen},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203044133103370},
booktitle={Acta Mathematica},
volume={48},
number={1},
pages={123-178},
year={1926},
}