@book{2049,
	author = {Gilchrist, T. L.},
	title = {Heterocyclic chemistry /},
	publisher = {Longman Group United Kingdom,},
	year = {1993.},
	address = {[S.l.] :},
	edition = {2nd ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0582064201/chopaconline-20}
}