1. Ya. E. Geguzin, Physics of Sintering (Nauka, Moscow, 1984) [in Russian].
2. M. S. Koval’chenko, Theoretical Fundamentals of Hot Pressure Working of Porous Materials (Naukova Dumka, Kiev, 1980) [in Russian].
3. S. P. Timoshenko and J. N. Goodier, Theory of Elasticity (McGraw Hill, New York, 1970).
4. G. Lamé, Leçons sur la théorie mathematique et l’elasticité des corps solides (Bachelier, Paris, 1852), p.384.
5. Ya. B. Fridman, Mechanical Properties of Metals, Part I: Deformation and Fracture (Mashinostroenie, Moscow, 1972) [in Russian].