@book{346,
	author = {Duuren, Jan Van. and Kastelein, Peter.},
	title = {Telecommunication Networks and Services /},
	publisher = {Addison-Wesley Pub (Sd),},
	year = {1993.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/0201565420/chopaconline-20}
}