1. Klimenko VV, Snytin S Yu, Fyodorov MV. Energy and forthcoming climatic change in 1990–2020. Teploenergetika 1990; 6: 14–20.
2. Snytin S Yu, Klimenko VV, Fyodorov MV. A forecast of energy consumption and carbon dioxide emission into the atmosphere for the period until 2100. Physics — Doklady 1994; 39(6): 457–60.
3. FAO production yearbook 1995,1996
4. Keeling CD, Whorf T.P. Atmospheric CO2 concentrations derived from in situ air samples collected at Mauna Loa Observatory, Hawaii. NDP–001/R7, ORNL/CDIAC, Oak Ridge, TN, USA., 1997.
5. Mikushina OV. Modeling and forecasting of major climate changes and climate factors during the christian times, Ph. D. thesis, Moscow Energy Institute, Moscow. 1997.