@article {50,
	title = {A Survey on Spectrum Management in Cognitive Radio Networks},
	journal = {IEEE Communications Magazine},
	volume = {46},
	year = {2008},
	month = {Apr. 2008},
	pages = {40-48},
	chapter = {40},
	url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4481339},
	author = {I. F. Akyildiz and W.-Y. Lee and Mehmet C. Vuran and S. Mohanty}
}
