@inproceedings{c.1951the,
title={The minimum of a binary quartic form},
author={C. S. Davis},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203130470086724},
booktitle={Acta Mathematica},
volume={84},
number={1},
pages={263-298},
year={1951},
}