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3. V. V. Khodot, R. N. Isaeva, and V. G. Krupenya, “Calculation of the reduction in gas pressure during degassing of thin coal seams by large-diameter boreholes,” Fiz.-Tekh. Probl. Razrab. Polezn. Iskop., No. 3 (1972).
4. V. V. Khodot, Gas Bursts [in Russian], Moscow (1961).
5. G. D. Lidin and A. É. Petrosyan, Gassiness of Coal Pits in the USSR [in Russian], Vol. 2, Moscow (1962).