@book{9133,
	author = {Johns, Allan Thomas. and Salman, S.K.},
	title = {Digital Protection For Power Systems },
	publisher = {The Institution of Engineering and Technology,},
	year = {1997},
	address = {London},
	url = {http://www.amazon.com/exec/obidos/ASIN/086341303X/chopaconline-20}
}