@INPROCEEDINGS {12179,
author={F. J. Velez and J. Oliveira and D.R. Robalo and O. Holland and H. Aghvami},
doi={},
booktitle={International Symp. on Wireless Communication Systems - ISWCS},
title={Energy Saving in the Optimization of the Planning of Fixed WiMAX with Relays in Hilly Terrains: Impact of Sleep Modes and Cell zooming},
year={2012},
month={August},
volume={-},
pages={---} 
}