@inproceedings{robert1992further,
title={Further improvements in Waring's problem},
author={Robert C. Vaughan, and Trevor D. Wooley},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203324306703513},
booktitle={Acta Mathematica},
volume={174},
number={2},
pages={147-240},
year={1992},
}
Robert C. Vaughan, and Trevor D. Wooley. Further improvements in Waring's problem. 1992. Vol. 174. In Acta Mathematica. pp.147-240. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203324306703513.