@INPROCEEDINGS {24476,
author={S. Ali Ali and D. Castanheira and A.  Silva and A. Gameiro},
doi={},
booktitle={Conf. on Telecommunications  - ConfTele},
title={Interference Alignment for the Downlink of Two-tier Coexisting Networks},
year={2015},
month={September},
volume={1},
pages={-------} 
}