MathSciDoc: An Archive for Mathematician ∫

@inproceedings{clas1971the,
  title={The asymptotic distribution of the eigenvalues of a degenerate elliptic operator},
  author={Clas Nordin},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203448264304161},
  booktitle={Arkiv for Matematik},
  volume={10},
  number={1},
  pages={9-21},
  year={1971},
}