1. Regression Diagnostics: Identifying Influential Data and Sources of Collinearity;Belsley,2004
2. Generalized Inverses: Theory and Applications;Ben-Israel,2003
3. Applied Regression Analysis;Draper,1998
4. Friedman, J., Hastie, T., Simon, N., Qian, J., Tibshirani, R., 2017. Package glmnet; document available from cran.r-project.org.
5. Statistical Learning with Sparsity;Hastie,2015