1. V. V. Skorokhod, Rheology-Based Theory of Sintering [in Russian], Naukova Dumka, Kiev (1975), p. 151.
2. V. V. Skorokhod and L. I. Tuchinskii, “Condition of plasticity of porous bodies,” Powder Metall. Met. Ceram., 17, No. 11, 880–883 (1978).
3. A. K. Grigor’ev and A. I. Rudskoi, Deformation and Compaction of Powder Materials [in Russian], Metallurgiya, Moscow (1992), p. 192.
4. M. Yu. Bal’shin, Scientific Basis of Powder and Fiber Metallurgy [in Russian], Metallurgiya, Moscow (1972), p. 336.
5. A. L. Gurson, “Continuum theory of ductile rupture by void nucleation and growth: Part I. Yield criteria and flow rules for porous ductile materials,” Teor. Osn. Inzh. Rasch., No. 1, 1–16 (1975).