@InBook{jondral2007evolution,
	author = {Jondral, Friedrich K and Blaschke, Volker},
	title = {Cognitive Wireless Networks},
	chapter = {Evolution of Digital Radios - From Analog to Cognitive Featgures},
	publisher = {Springer},
	editor = {Fitzek, F. and Katz, M},
	pages = {635–655},
	year = {2007},
}