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2. A. N. Guz, G. N. Savin and I. A. Tsurpal, ?Stress concentrations close to curvilinear openings in a physically nonlinear elastic plate,? Arch. Mech. Stos., vol. 16, no. 4, Warsaw, 1964.
3. H. Kauderer, Nonlinear Mechanics [Russian translation], Moscow IL, 1961.
4. N. I. Muskhelishvili, Certain Basic Problems of the Mathematical Theory of Elasticity [in Russian], Moscow, Izd-vo AN SSSR, 1954.
5. G. N. Savin, Stress Concentrations Close to Openings [in Russian], Moscow, GITTL, 1951.