title = {Guide to Wireless Sensor Networks},
publisher = {Springer-Verlag London Limited},
year = {2009},
-}
\ No newline at end of file
+}
+
+
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+ pages={19--31},
+ year={2005},
+ publisher={IEEE}
+}
+
+@inproceedings{ref224,
+ title={Probabilistic coverage in wireless sensor networks},
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+ booktitle={Local Computer Networks, 2005. 30th Anniversary. The IEEE Conference on},
+ pages={8--pp},
+ year={2005},
+ organization={IEEE}
+}
+
+@inproceedings{ref225,
+ title={Incremental Model for Complete Area Coverage in Wireless Sensor Networks},
+ author={Sethi, Hemendra Kumar and Dash, Sasmita and Lenka, Manas Ranjan and Swain, Amulya Ratna},
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+ pages={92--97},
+ year={2015},
+ organization={IEEE}
+}
+
+@article{ref226,
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+}
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+@article{ref227,
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+ Maggie Xiaoyan Cheng and
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+ Deying Li and
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+}
+
+@inproceedings{ref228,
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+ series = {EW'07},
+ year = {2007},
+ location = {Paris, France},
+
+}
+
+@inproceedings{ref229,
+ title={A near optimal algorithm for lifetime optimization in wireless sensor networks},
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+
+@article{ref230,
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+ year={2007},
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+}
+
+@inproceedings{ref231,
+ title={Maximize lifetime of heterogeneous wireless sensor networks with joint coverage and connectivity requirement},
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+ pages={226--231},
+ year={2009},
+ organization={IEEE}
+}
+
+@incollection{ref232,
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+}
+
+@inproceedings{ref234,
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+ pages={1--6},
+ year={2010},
+ organization={IEEE}
+}
+
+@inproceedings{ref235,
+ title={Mobility improves coverage of sensor networks},
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+ pages={300--308},
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+ organization={ACM}
+}
\ No newline at end of file
