@book{590161,
	author = {Hagen, Jon B.},
	title = {Radio-frequency electronics :},
	publisher = {Cambridge University Press,},
	year = {2009.},
	address = {Cambridge ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0906/2009007355-b.html}
}