1. A Catalog of Gently Dipping Seams and Heavy Roof Areas in Coal Basins of the USSR [in Russian], VNIMI, Leningrad (1976).
2. V. G. Beskaravannyi, “Controlling the rock bed in complex mining and geological conditions by explosions and waterlogging,” in: Physical Processes of Mining Operations [in Russian], Vol. 2, Leningrad State Univ. (1975).
3. Yu. A. Semenov and M. M. Mukushev, Controlling Hard-to-Collapse Roofs by Advance Shooting [in Russizn], Ékspress-Inform. TsINÉIugol’, Moscow (1980).
4. P. M. Trukhin, Yu. L. Khudin, et al., Improved Methods for Control of Hard-to-Collapse Seam Roofs [in Russian], KNIUI, Karaganda (1970).
5. G. N. Kochev and A. N. Osipov, “Hydraulic treatment of a rock bed,” in: New Methods for Loosening Hard-to-Collapse Roofs in Coal Mines [in Russian], Nedra, Moscow (1979).