@ARTICLE {6935,
author={J.P.  Vilela and J. Barros},
doi={10.1109/TIFS.2011.2111370},
journal={IEEE Transactions on Information Forensics and Security},
title={Wireless Secrecy Regions with Friendly Jamming},
year={2011},
month={June},
volume={6},
number={2},
pages={256-266},
ISSN={1556-6013}
}