@book{3498,
	author = {Chorafas, Dimitris N.},
	title = {Fourth and Fifth Generation Programming Languages : integrated software, database languages, and expert systems},
	publisher = {Mcgraw-Hill (Tx),},
	year = {1986.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/0070108641/chopaconline-20}
}