@book{3500,
	author = {Gupta, Amar. and Prasad, Bandreddi.},
	title = {Principles of expert systems /},
	publisher = {Ieee,},
	year = {1988.},
	series = {Ieee press selected reprint series.},
	address = {[S.l.] :},
	edition = {First Edition.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0879422203/chopaconline-20}
}