@book{553,
	author = {John, Joule.},
	title = {Heterocyclic chemistry /},
	publisher = {Blackwell},
	year = {2007},
	address = {U.K},
	note = {Import.},
	url = {http://www.amazon.com/exec/obidos/ASIN/1405130849/chopaconline-20}
}