@article {4363814,
	title = {{Binary integer programming formulation and heuristics for differentiated coverage in heterogeneous sensor networks}},
	journal = {Computer Networks},
	volume = {52},
	year = {2008},
	pages = {2419{\textendash}2431},
	doi = {10.1016/j.comnet.2008.05.002},
	author = {I. Kuban Altinel and Necati Aras and Evren G{\"u}ney and Cem Ersoy}
}
