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Chicago-Zitierstil (17. Ausg.)O.F, Lyashenko, und Liashenko D.V. The Comparative Analysis of Experience and Opportunities of Extraction of Methane of Coal Deposits in the Different Countries of the World. General Energy Institute of the National Academy of Sciences of Ukraine, 2007.
MLA-Zitierstil (8. Ausg.)O.F, Lyashenko, und Liashenko D.V. The Comparative Analysis of Experience and Opportunities of Extraction of Methane of Coal Deposits in the Different Countries of the World. General Energy Institute of the National Academy of Sciences of Ukraine, 2007.