+
+@article{doi:10.1080/0305215X.2012.687732,
+author = {Singh, Alok and Rossi, André and Sevaux, Marc},
+title = {Metaheuristic approaches for Q-coverage problem versions in wireless sensor networks},
+journal = {Engineering Optimization},
+volume = {45},
+number = {5},
+pages = {609-626},
+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}
+}
+
+
+