@misc{CheZhaLuCheZheYu13,
 author={Tianqi Chen and Weinan Zhang and Qiuxia Lu and Kailong Chen and Zhao Zheng and Yong Yu},
 title={SVDFeature, A Toolkit for Informative Collaborative Filtering},
 year={2013},
 note={\url{http://mloss.org/software/view/333/}}
}