MathSciDoc: An Archive for Mathematician ∫

@inproceedings{t.1961the,
  title={The Diophantine equation$x$^{2}+7=2^{$n$}},
  author={T. Nagell},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203425347584967},
  booktitle={Arkiv for Matematik},
  volume={4},
  number={2},
  pages={185-187},
  year={1961},
}