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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 3, pp. 9–10, March, 1987.
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Nadirov, N.K., Kotova, A.V., Ergalieva, A.K. et al. Obtaining vanadyl porphyrins from asphaltite of sadkinsk deposit. Chem Technol Fuels Oils 23, 116–117 (1987). https://doi.org/10.1007/BF00725912
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DOI: https://doi.org/10.1007/BF00725912