@book{30593,
	author = {CHEN, Wai-Kai},
	title = {The circuits and filters :},
	publisher = {CRC :},
	year = {1995.},
	series = {The Electrical Engineering Handbook Series},
	address = {Boca Raton :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=30593}
}