@article {Simula.simula.1752,
	title = {Sensing-Energy Tradeoff in Cognitive Radio Networks With Relays},
	journal = {IEEE Systems Journal},
	volume = {7},
	number = {1},
	year = {2013},
	pages = {68-76},
	author = {Huang, S. and Chen, H. and Zhang, Yan and Chen, H.}
}
