}
+@article{bianchi2009survey,
+ title={A survey on metaheuristics for stochastic combinatorial optimization},
+ author={Bianchi, Leonora and Dorigo, Marco and Gambardella, Luca Maria and Gutjahr, Walter J},
+ journal={Natural Computing: an international journal},
+ volume={8},
+ number={2},
+ pages={239--287},
+ year={2009},
+ publisher={Kluwer Academic Publishers}
+}
+
+@book{hassanien2015applications,
+ title={Applications of Intelligent Optimization in Biology and Medicine: Current Trends and Open Problems},
+ author={Hassanien, Aboul-Ella and Grosan, Crina and Tolba, Mohamed Fahmy},
+ volume={96},
+ year={2015},
+ publisher={Springer}
+}
+
+@article{goldberg1991comparative,
+ title={A comparative analysis of selection schemes used in genetic algorithms},
+ author={Goldberg, David E and Deb, Kalyanmoy},
+ journal={Foundations of genetic algorithms},
+ volume={1},
+ pages={69--93},
+ year={1991}
+}
+
+@article{gentili2013,
+year={2013},
+journal={Optimization Letters},
+volume={7},
+number={1},
+title={α-Coverage to extend network lifetime on wireless sensor networks},
+publisher={Springer-Verlag},
+author={Gentili, Monica and Raiconi, Andrea},
+pages={157-172},
+}
+
+
+@article{idrees2015distributed,
+ title={Distributed lifetime coverage optimization protocol in wireless sensor networks},
+ author={Idrees, Ali Kadhum and Deschinkel, Karine and Salomon, Michel and Couturier, Rapha{\"e}l},
+ journal={The Journal of Supercomputing},
+ volume={71},
+ number={12},
+ pages={4578--4593},
+ year={2015},
+ publisher={Springer US}
+}
