1. B. Grabovski, “Vibrational properties of a turbine with a transverse crack,“ Trans. ASME, Design Eng. Technol., No. 1, 98–104 (1980).
2. N. P. Plakhtienko, “Diagnostics of piecewise constant rigidity in nonlinear resonances,” Prikl. Mekh.,27, No. 10, 111–110 [sic] (1991).
3. N. P. Plakhtienko, “One effect of Coulomb friction in nonsteady forced vibrations,” Prikl. Mekh.,14, No. 2, 136–138 (1978).
4. S. L. Tsifanskii, M. A. Magone, and V. M. Ozhiganov, “Utilization of nonlinear effects for detecting cracks in rod elements of structures,” Defektoskopiya, No. 3, 77–82 (91985).
5. I. V. Maies and V. G. Davis, “Vibrations of a multishaft rotor-and-bearings system with a transverse crack in the rotor,” Trans. ASME, Design Eng. Technol., No. 1, 65–73 (1984).