@inproceedings{christopher1984on,
title={On Waring’s problem},
author={Christopher Hooley},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203306876416389},
booktitle={Acta Mathematica},
volume={157},
number={1},
pages={49-97},
year={1984},
}