Sparse Online Learning via Truncated Gradient
Tong Zhang and John Langford and Lihong Li

@article{10:28,author={John Langford and Lihong Li and Tong Zhang}, Title={Sparse Online Learning via Truncated Gradient},journal={Journal of Machine Learning Research},volume={10}, url={http://www.jmlr.org/papers/volume10/langford09a/langford09a.pdf}}