}
+@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}
+}
+
+@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",
+
+}
+
+@ARTICLE{glpk,
+author = {Andrew Makhorin},
+title = {The GLPK (GNU Linear Programming Kit)},
+journal = {Available: https://www.gnu.org/software/glpk/},
+year = {2012}
+}
\ No newline at end of file
