1. A. Ya. Grigorenko, T. L. Efimova, and L. V. Sokolova, “On the investigation of free vibrations of nonthin cylindrical shells of variable thickness by the spline-collocation method,” Mat. Met. Fiz.-Mekh. Polya, 53, No. 4, 169–179 (2010); English translation: J. Math. Sci., 53, No. 4, 506–519 (2012).
2. T. L. Efimova, “Solution of problems of free torsional vibrations of thick-walled orthotropic inhomogeneous cylinders,” Mat. Met. Fiz.-Mekh. Polya, 52, No. 1, 92–100 (2009); English translation: J. Math. Sci., 168, No. 4, 613–623 (2010).
3. S. G. Lekhnitskii, Theory of Elasticity of an Anisotropic Body [in Russian], Nauka, Moscow (1977).
4. A. K. Malmaister, V. P. Tamuzh, and G. A. Teters, Strength of Polymeric and Composite Materials [in Russian], Zinatne, Riga (1980).
5. B. E. Pobedrya and S V. Sheshenin, “Some problems of the equilibrium of an elastic parallelepiped,” Izv. Akad. Nauk SSSR, Ser. Mekh. Tverd. Tela, No. 1, 74–86 (1981).