publisher={Morgan Kaufmann Publishers}
}
+@inproceedings{ref156,
+ author = {F. Pedraza and A. L. Medaglia and A. Garcia},
+ title = {Efficient coverage algorithms for wireless sensor networks},
+ booktitle = {Proceedings of the 2006 Systems and Information Engineering Design Symposium},
+ pages = {78-83},
+ YEAR = {2006},
+}
+
+@book{ref157,
+ title={Handbook of sensor networks: algorithms and architectures},
+ author={Stojmenovic, Ivan},
+ volume={49},
+ year={2005},
+ publisher={John Wiley \& Sons}
+}
+
+@ARTICLE{ref158,
+author = {A. Varga},
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+journal = {Available: http://www.omnetpp.org},
+year = {2003},
+}
+
+@inproceedings{ref159,
+ title={Coverage and Lifetime Optimization in Heterogeneous Energy Wireless Sensor Networks},
+ author={Idrees, Ali Kadhum and Deschinkel, Karine and Salomon, Michel and Couturier, Rapha{\"e}l},
+ booktitle={ICN 2014, The Thirteenth International Conference on Networks},
+ pages={49--54},
+ year={2014}
+}
+
+@article{ref160,
+ title={Transforming Area Coverage to Target Coverage to Maintain Coverage and Connectivity for Wireless Sensor Networks},
+ author={Deng, Xiu and Yu, Jiguo and Yu, Dongxiao and Chen, Congcong},
+ journal={International Journal of Distributed Sensor Networks},
+ volume={2012},
+ year={2012},
+ publisher={Hindawi Publishing Corporation}
+}
+
+@inproceedings{ref161,
+ title={Algorithms for node clustering in wireless sensor networks: A survey},
+ author={Kumarawadu, Priyantha and Dechene, Dan J and Luccini, Marco and Sauer, Allan},
+ booktitle={Information and Automation for Sustainability, 2008. ICIAFS 2008. 4th International Conference on},
+ pages={295--300},
+ year={2008},
+ organization={IEEE}
+}
+
+@ARTICLE{glpk,
+author = {Andrew Makhorin},
+title = {The GLPK (GNU Linear Programming Kit)},
+journal = {Available: https://www.gnu.org/software/glpk/},
+year = {2012},
+}
+
+@techreport{Idrees2,
+ author = {Idrees, Ali Kadhum and Deschinkel, Karine and Salomon, Michel and Couturier, Rapha{\"e}l},
+ institution = {University of Franche-Comte - FEMTO-ST Institute, DISC Research Department},
+ title = {Distributed Lifetime Coverage Optimization Protocol in Wireless Sensor Networks},
+ number = {DISC2014-X},
+ month = {Octobre},
+ year = {2014}
+}
+
+@article{0031-9155-44-1-012,
+ author={Eva K Lee and Richard J Gallagher and David Silvern and Cheng-Shie Wuu and Marco Zaider},
+ title={Treatment planning for brachytherapy: an integer programming model, two computational approaches and experiments with permanent prostate implant planning},
+ journal={Physics in Medicine and Biology},
+ volume={44},
+ number={1},
+ pages={145},
+ url={http://stacks.iop.org/0031-9155/44/i=1/a=012},
+ year={1999}
+}
+
+@BOOK{AMPL,
+ AUTHOR = "Robert Fourer and David M. Gay and Brian W. Kernighan",
+ TITLE = "AMPL: A Modeling Language for Mathematical Programming",
+ PUBLISHER = "Cengage Learning",
+ YEAR = "November 12, 2002",
+ edition = "2nd",
+
+}
+
