1. Energy Information Administration. "Annual Energy Outlook 2006 with Projections to 2030.":http://www.eia.doe.gov/oiaf/aeo/pdf/overview.pdf.
2. Environmental data compendium 1995.Paris(France):Organization for Economic Cooperation and Development(OECD) 1995.
3. He Xiaoqun. "Methods and Applications of Modern Statistical Analysis." China Renmin University Press 1998.
4. Samaras Z. Zachariadis T. Babajimopoulos A. Hassel D. Weber F-J Sonnborn
5. K-S etal . "Study on transport-related parameters of the European road vehicle stock. In: