@inproceedings{åke1954a,
title={A study of certain Green's functions with applications in the theory of vibrating membranes},
author={Åke Pleijel},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203417743660899},
booktitle={Arkiv for Matematik},
volume={2},
number={6},
pages={553-569},
year={1954},
}
Åke Pleijel. A study of certain Green's functions with applications in the theory of vibrating membranes. 1954. Vol. 2. In Arkiv for Matematik. pp.553-569. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203417743660899.