@inproceedings{wenyuanthe,
title={The relationship between the cubic function and their tangents and secants},
author={Wenyuan Zeng},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160813215156514196114},
}
Wenyuan Zeng. The relationship between the cubic function and their tangents and secants. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160813215156514196114.