O.F, L., & M.O, P. (2004). Quality of the Ukrainian Coal: Normative Base Area, State-of-the-art, Measures for the Improvement. General Energy Institute of the National Academy of Sciences of Ukraine.
Chicago-Zitierstil (17. Ausg.)O.F, Lyashenko, und Perov M.O. Quality of the Ukrainian Coal: Normative Base Area, State-of-the-art, Measures for the Improvement. General Energy Institute of the National Academy of Sciences of Ukraine, 2004.
MLA-Zitierstil (8. Ausg.)O.F, Lyashenko, und Perov M.O. Quality of the Ukrainian Coal: Normative Base Area, State-of-the-art, Measures for the Improvement. General Energy Institute of the National Academy of Sciences of Ukraine, 2004.
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