@book{86038,
	author = {Housley, Trevor. and ebrary, Inc.},
	title = {Data communications & teleprocessing systems},
	publisher = {BS Publications,},
	year = {2008.},
	address = {Hyderabad [India] :},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10415181}
}