@book{6885,
	author = {Johns, A. T. and Salman, S. K.},
	title = {Digital protection for power systems /},
	publisher = {Peter Peregrinus Ltd,},
	year = {1995.},
	series = {I E E power engineering series.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/0863411959/chopaconline-20}
}