李東風主頁:https://www.math.pku.edu.cn/teachers/lidf/
統計計算:https://www.math.pku.edu.cn/teachers/lidf/docs/statcomp/html/_statcompbook/index.html
R語言教程:https://www.math.pku.edu.cn/teachers/lidf/docs/Rbook/html/_Rbook/index.html
金融時間序列分析講義:https://www.math.pku.edu.cn/teachers/lidf/course/fts/ftsnotes/html/_ftsnotes/index.html