6Jorgenson, D. and P. J. Wilcoxen (1989): "Environmental regulations and U. S. econornic growth", presented at the MIT Workshop on Energy and Environmental Modeling, July31 - Aug. 1,also published in Rand Journal of Economies, Summer 1990.
7Burniaux, J. - M,, G. Nicoletti and J.O. Martins (1992):"GREEN: A global model for quantifying the costs of policies to curb CO2 emissions", OECD Economic Studies, 19.
8European Commission ( 1995 ) : " The GEM - E3 Energy Model", Report, DG-XII, Brussels.
