@INPROCEEDINGS {14948,
author={S. Ali Ali and D. Castanheira and A.  Silva and A. Gameiro},
doi={0},
booktitle={International Conf. on Telecommunications - ICT},
title={Downlink cognitive interference alignment for heterogeneous networks},
year={2014},
month={May},
volume={1},
pages={1-1} 
}
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