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4. A. T. Shamanskaya, I. N. Dudyrev, and V. A. Asanov, “The state of rock massif in deep horizons of the Kochkar ore deposit,” in: Mountain Shocks, Methods of Evaluation and Control of Shock Hazard in Rock Massifs, All-Union Conference, Frunze [in Russian], Izd. Akad. Nauk KirgSSR (1979).
5. V. D. Pechenkin, A. F. Pyatkov, V. S. Suraev, and Yu. M. Tsygalov, “Investigation of stress state in rock massif of the Kochkar and Gai ore deposits,” in: Rock Pressure and Methods of Its Control [in Russian], Ilim, Frunze (1979).