@book{98859,
	author = {X Repsol-Harvard Seminar on Energy Policy [ June, 1999; Madrid, Spain] and Hogan, William W.  \ Stelzer, Irwin M.},
	title = {Preparing for the twenty-first century /},
	publisher = {John F. Kennedy School of Goverment Harvard University,},
	year = {1999      },
	series = {Fundación Repsol YPF},
	address = {Cambridge :}
}