@book{150014,
	author = {Hamilton, James D. and National Bureau of Economic Research and National Bureau of Economic Research},
	title = {What is an oil shock?},
	year = {2000},
	series = {NBER Working Paper Series},
	note = {Navegadores de Internet ; Adobe Acrobat (PDF)},
	url = {http://papers.nber.org/papers/w7755.pdf}
}