@book{82520,
	author = {Hewitson, Les. and Brown, Mark. and ebrary, Inc.},
	title = {Practical power system protection},
	publisher = {Elsevier/Newnes,},
	year = {2004.},
	address = {Oxford ;},
	edition = {4th ed.},
	note = {Includes index.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10138705}
}