\bibitem[Xing, Li, and Wang(2010)]{5714480}
Xing, Xiaofei, Jie Li, and Guojun Wang. 2010. ``Integer Programming Scheme for
Target Coverage in Heterogeneous Wireless Sensor Networks.'' In \emph{Mobile
Ad-hoc and Sensor Networks (MSN), 2010 Sixth International Conference on,}
\bibitem[Xing, Li, and Wang(2010)]{5714480}
Xing, Xiaofei, Jie Li, and Guojun Wang. 2010. ``Integer Programming Scheme for
Target Coverage in Heterogeneous Wireless Sensor Networks.'' In \emph{Mobile
Ad-hoc and Sensor Networks (MSN), 2010 Sixth International Conference on,}