@misc{LiuZenYanYanYan14,
 author={Xiaosheng Liu and Jia Zeng and Xi Yang and Jianfeng Yan and Qiang Yang},
 title={Scalable Parallel EM Algorithms for LDA in Multi Core Systems},
 year={2014},
 note={\url{http://mloss.org/software/view/584/}}
}