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3. M. A. Babaev and I. A. Tsurpal, collection: Proceedings of the Sixth All-Union Conference on the Theory of Shells and Plates (Baku, 1966), [in Russian], Izd-vo Nauka, Moscow, 1966.
4. I. Yu. Babich and A. A. Kaminskii, Prikladnaya mekhanika, vol. 1, no. 9, 1965.
5. L. T. Berezhnitskii, collection: Stress Concentrations, No. 1 [in Russian], Izd-vo Naukova dumka, Kiev, 1965