@inproceedings{jianqing1992best,
title={Best possible constant for bandwidth selection},
author={Jianqing Fan, and James S Marron},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221113726421789886},
booktitle={The Annals of Statistics},
pages={2057-2070},
year={1992},
}