+@inproceedings{wang2007energy,
+ title={Energy efficient coverage with variable sensing radii in wireless sensor networks},
+ author={Wang, Jiong and Medidi, Sirisha},
+ booktitle={Wireless and Mobile Computing, Networking and Communications, 2007. WiMOB 2007. Third IEEE International Conference on},
+ pages={61--61},
+ year={2007},
+ organization={IEEE}
+}
+
+@inproceedings{vu2009delaunay,
+ title={Delaunay-triangulation based complete coverage in wireless sensor networks},
+ author={Vu, Chinh T and Li, Yingshu},
+ booktitle={Pervasive Computing and Communications, 2009. PerCom 2009. IEEE International Conference on},
+ pages={1--5},
+ year={2009},
+ organization={IEEE}
+}
+
+@article{yang2014energy,
+author={Yang, Q. and He, S. and Li, J. and Chen, J. and Sun, Y.},
+journal={Vehicular Technology, IEEE Transactions on},
+title={Energy-Efficient Probabilistic Area Coverage in Wireless Sensor Networks},
+volume={PP},
+number={99},
+pages={1-1},
+year={2014},
+
+}
+
+@inproceedings{ling2009energy,
+ title={Energy efficient adaptive sensing for dynamic coverage in wireless sensor networks},
+ author={Ling, Hui and Znati, Taieb},
+ booktitle={Wireless Communications and Networking Conference, 2009. WCNC 2009. IEEE},
+ pages={1--6},
+ year={2009},
+ organization={IEEE}
+}
+
+@inproceedings{diongue2013alarm,
+ title={ALARM: An energy aware sleep scheduling algorithm for lifetime maximization in wireless sensor networks},
+ author={Diongue, Dame and Thiare, Ousmane},
+ booktitle={Wireless Technology and Applications (ISWTA), 2013 IEEE Symposium on},
+ pages={74--79},
+ year={2013},
+ organization={IEEE}
+}
+
+
+@INPROCEEDINGS{shi2009,
+author={Qinghua Shi and Xiaozhen Wei and Yu Peng and Shiqian Li},
+booktitle={Computer Network and Multimedia Technology, 2009. CNMT 2009. International Symposium on},
+title={An Energy-Efficient Central-Scheduling Scheme in Wireless Sensor Networks},
+year={2009},
+month={Jan},
+pages={1-4},
+}
+
+@inproceedings{qu2013distributed,
+ title={A distributed area coverage algorithm for maintenance of randomly distributed sensors with adjustable sensing range},
+ author={Qu, Yipeng and Georgakopoulos, Stavros V},
+ booktitle={Global Communications Conference (GLOBECOM), 2013 IEEE},
+ pages={286--291},
+ year={2013},
+ organization={IEEE}
+}
+
+@inproceedings{xin2009area,
+ title={The area coverage algorithm to maintain connectivity for WSN},
+ author={Xin, He and Ke, Yin and Xiaolin, Gui},
+ booktitle={Computer and Information Technology, 2009. CIT'09. Ninth IEEE International Conference on},
+ volume={2},
+ pages={81--86},
+ year={2009},
+ organization={IEEE}
+}
+
+@article{deschinkel2012column,
+ title={A Column Generation based Heuristic to Extend Lifetime in Wireless Sensor Network.},
+ author={Deschinkel, Karine},
+ journal={Sensors \& Transducers Journal},
+ volume={14-2},
+ pages={242--253},
+ year={2012}
+}
+
+@article{rossi2012exact,
+ title={An exact approach for maximizing the lifetime of sensor networks with adjustable sensing ranges},
+ author={Rossi, Andr{\'e} and Singh, Alok and Sevaux, Marc},
+ journal={Computers \& Operations Research},
+ volume={39},
+ number={12},
+ pages={3166--3176},
+ year={2012},
+ publisher={Elsevier}
+}
+
+ @inproceedings{chenait2013distributed,
+ title={Distributed and stable energy-efficient scheduling algorithm for coverage in wireless sensor networks},
+ author={Chenait, Manel and Zebbane, Bahia and Belbezza, Hamza and Balli, Hakim and Badache, Nadjib},
+ booktitle={Wireless Communications and Mobile Computing Conference (IWCMC), 2013 9th International},
+ pages={418--423},
+ year={2013},
+ organization={IEEE}
+}
+
+@inproceedings{yangnovel,
+ title={A Novel Distributed Algorithm for Complete Targets Coverage in Energy Harvesting Wireless Sensor Networks },
+ author={Yang, Changlin and Chin, Kwan-Wu},
+ booktitle={IEEE ICC 2014- Ad-hoc and Sensor Networking Symposium},
+ pages={361--366},
+ year={2014},
+ organization={IEEE}
+}
+
+@inproceedings{Kumar:2005,
+ author = {Kumar, Santosh and Lai, Ten H. and Arora, Anish},
+ title = {Barrier Coverage with Wireless Sensors},
+ booktitle = {Proceedings of the 11th Annual International Conference on Mobile Computing and Networking},
+ series = {MobiCom '05},
+ year = {2005},
+ isbn = {1-59593-020-5},
+ location = {Cologne, Germany},
+ pages = {284--298},
+ numpages = {15},
+ url = {http://doi.acm.org/10.1145/1080829.1080859},
+ doi = {10.1145/1080829.1080859},
+ acmid = {1080859},
+ publisher = {ACM},
+ address = {New York, NY, USA},
+ keywords = {barrier coverage, coverage, critical conditions, localized algorithms, network topology, random geometric graphs, wireless sensor networks},
+}
+
+@article{Deng2012,
+ title={Transforming Area Coverage to Target Coverage to Maintain Coverage and Connectivity for Wireless Sensor Networks},
+ author={Xiu Deng and Jiguo Yu, Dongxiao Yu and Congcong Chen},
+ journal={International Journal of Distributed Sensor Networks},
+ volume={2012},
+ year={2012},
+ ee = {http://dx.doi.org/10.1155/2012/254318}
+}
+
+ @inproceedings{jaggi2006,
+ title={Energy-efficient Connected Covereage in Wireless Sensor Networks},
+ author={N. Jaggi and A.A. Abouzeid},
+ booktitle={Proceeding of 4th Asian International Mobile Computing Conference AMOC2006},
+ year={2006}
+}
+
+@INPROCEEDINGS{5714480,
+author={Xiaofei Xing and Jie Li and Guojun Wang},
+booktitle={Mobile Ad-hoc and Sensor Networks (MSN), 2010 Sixth International Conference on},
+title={Integer Programming Scheme for Target Coverage in Heterogeneous Wireless Sensor Networks},
+year={2010},
+month={Dec},
+pages={79-84},
+keywords={energy conservation;integer programming;wireless sensor networks;ETCA;clustered configurations;clusterheads;energy first algorithm;energy-efficient target coverage algorithm;heterogeneous wireless sensor networks;integer programming;network lifetime;polytype target coverage;sensor node;Algorithm design and analysis;Clustering algorithms;Energy consumption;Logic gates;Sensors;Simulation;Wireless sensor networks;Heterogeneous wireless sensor networks;network lifetime;optimization;target coverage},
+doi={10.1109/MSN.2010.18},}
+
+@article{Yang2014,
+ title={A Maximum Lifetime Coverage Algorithm Based on Linear Programming},
+ author={Mengmeng Yang and Jie Liu},
+ journal={Journal of Information Hiding an dMultimedia Signal Processing, Ubiquitous International},
+ volume={5},
+ number={2},
+ pages={296-301},
+ year={2014}
+}
+
+
+@article{ref17,
+ title={A survey on sensor networks},
+ author={Akyildiz, Ian F and Su, Weilian and Sankarasubramaniam, Yogesh and Cayirci, Erdal},
+ journal={IEEE Communications magazine},
+ volume={40},
+ number={8},
+ pages={102--114},
+ year={2002},
+ publisher={IEEE}
+}
