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USSR Inventor's Certificate 1279366.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 5, p. 41, September–October, 1995.
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Samedova, F.I., Mir-Babaev, M.F. Separation of asphaltenes by a physical method. Chem Technol Fuels Oils 31, 251–252 (1995). https://doi.org/10.1007/BF00727201
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DOI: https://doi.org/10.1007/BF00727201