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2. M. Ya. Leonov, V. A. Panyaev, and K. M. Rusinko, “Relation between stresses and deformations for semi-brittle bodies,” Mekh. Tverd. Tela, No. 5 (1967).
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4. handbook on Mechanical Properties of Constructive Materials in Complex Stress State [in Russian], Naukova Dumka, Kiev (1983).
5. A. N. Stavrogin, and A. G. Protosenya, Rock Strength and Stability of Mine Workings at Large Depths [in Russian], Nedra, Moscow (1985).