1. S. P. Timoshenko, Vibration Problems in Engineering (Nauka, Moscow, 1967) [in Russian].
2. I. M. Lebedev and E. I. Shifrin, “Solution of the inverse spectral problem for a rod weakened by transverse cracks by the Levenberg-Marquardt optimization algorithm,” Mech. Solids 54 (6), 857–872 (2019). https://doi.org/10.3103/S0025654419060025
3. M. N. Perelmuter, A. L. Popov, D. A. Chelyubeev, and V. I. Bukhalov, “Analysis of the effectiveness of healing defects when they are filled with various materials,” in Proc. of International Conference “Applied Mathematics, Computational Science and Mechanics: Current Problems,” 11–13 November 2019, Voronezh (Voronezh. Gos. Univ., Voronezh, 2020), pp. 1488–1492.
4. Yu. K. Konenkov, “Diffraction of a flexural wave on a circular obstacle in a plate,” Akust. Zh.
10 (2), 186–190 (1964).
5. V. A. Borovikov, A. L. Popov, and D. A. Chelyubeev, “The acoustic field excited by flexural vibrations of an elastic plate with a circular inclusion,” Acoust. Phys. 53, 660–669 (2007).
https://doi.org/10.1134/S1063771007060024