@inproceedings{liping2014a,
title={A generalized Koszul theory and its relation to the classical theory},
author={Liping Li},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170222103519249306490},
booktitle={J. Algebra},
volume={420},
pages={217-241},
year={2014},
}

Liping Li. A generalized Koszul theory and its relation to the classical theory. 2014. Vol. 420. In J. Algebra. pp.217-241. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170222103519249306490.