@article{TKDE:2015:Zhao,<br>
author={Zhou Zhao and Lijun Zhang and Xiaofei He and Wilfred Ng},<br>
journal={IEEE Transactions on Knowledge and Data Engineering (TKDE)},<br>
title={Expert Finding for Question Answering via Graph Regularized Matrix Completion},<br>
year={2015},<br>
volume={27},<br>
number={4},<br>
pages={993--1004},<br>
}