MathSciDoc: An Archive for Mathematician ∫

@inproceedings{trygve1963on,
  title={On the A-numbers in the quadratic fields K $$(\sqrt { \pm 37} )$$ },
  author={Trygve Nagell},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203428455596994},
  booktitle={Arkiv for Matematik},
  volume={4},
  number={6},
  pages={511-521},
  year={1963},
}