MathSciDoc: An Archive for Mathematician ∫

@inproceedings{bengt1955on,
  title={On the diophantine equation$u$^{2}−$D v$^{2}= ± 4$N$},
  author={Bengt Stolt},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203418862566909},
  booktitle={Arkiv for Matematik},
  volume={3},
  number={2},
  pages={117-132},
  year={1955},
}