@ARTICLE{weizhou2015, 
author={Zhou, W. and Jing, T. and Cheng, W. and Chen, T. and Huo, Y.}, 
journal={Computer Communications, ELSEVIER}, 
title={Combinatorial auction based spectrum allocation under heterogeneous supply and demand}, 
year={2015}, 
month={April}, 
volume={60},  
pages={109-118},}