@inproceedings{bengt1957on,
title={On a diophantine equation of the second degree},
author={Bengt Stolt},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203421821319934},
booktitle={Arkiv for Matematik},
volume={3},
number={4},
pages={381-390},
year={1957},
}