+year = {2013}
+}
+
+@article{doi:10.1155/2010/926075,
+author = {Hung, Ka-Shun and Lui, King-Shan},
+title = {Perimeter Coverage Scheduling in Wireless Sensor Networks Using Sensors with a Single Continuous Cover Range},
+journal = {EURASIP Journal on Wireless Communications and Networking },
+volume = {2010},
+year = {2010}
+}
+
+
+@inproceedings{vu2009universal,
+ title={A universal framework for partial coverage in Wireless Sensor Networks},
+ author={Vu, Chinh and Chen, Guantao and Zhao, Yi and Li, Yingshu},
+ booktitle={Performance Computing and Communications Conference (IPCCC), 2009 IEEE 28th International},
+ pages={1--8},
+ year={2009},
+ organization={IEEE}
+}
+
+@article{li2011transforming,
+ title={Transforming complete coverage algorithms to partial coverage algorithms for wireless sensor networks},
+ author={Li, Yingshu and Vu, Chinh and Ai, Chunyu and Chen, Guantao and Zhao, Yi},
+ journal={Parallel and Distributed Systems, IEEE Transactions on},
+ volume={22},
+ number={4},
+ pages={695--703},
+ year={2011},
+ publisher={IEEE}
+}