Anthony D. Wood John A. Stankovic Gang Zhou DEEJAM: Defeating Energy-Efficient Jamming in IEEE 802.15.4-based Wireless Networks. 60-69 2007 SECON http://dx.doi.org/10.1109/SAHCN.2007.4292818 conf/secon/2007 db/conf/secon/secon2007.html#WoodSZ07