User’s Guide : Advanced Single Equation Analysis : Elastic Net and Lasso : References
  
References
Friedman, J., T. Hastie, and R. Tibshirani. (2010). Regularization paths for generalized linear models via coordinate descent. Journal of Statistical Software, 33(1), 1–22.
Hastie, T., R. Tibshirani, and J. Friedman (2009). The Elements of Statistical Learning, Second Edition. New York: Springer.
Hastie, T., R. Tibshirani, and M. Wainwright. (2015). Statistical learning with sparsity: the lasso and generalizations. CRC Press.
Zou, H., and T. Hastie. (2005). “Regularization and variable selection via the elastic net,” Journal of the Royal Statistical Society: Series B (Statistical Methodology), 67(2), 301–320.