@book{129700,
	author = {Camarillo, Gonzalo. and ebrary, Inc.},
	title = {SIP demystified},
	publisher = {McGraw-Hill,},
	year = {c2002.},
	series = {McGraw-Hill telecom},
	address = {New York :},
	url = {http://site.ebrary.com/lib/strathmore/Doc?id=10153028}
}