1. Yu. P. Zhigalko and S. I. Solov’ev, “Natural oscillations of a beam with a harmonic oscillator,” Russ. Math. 45 (10), 33–35 (2001).
2. S. I. Solov’ev, Eigenvibrations of a Plate with Elastically Attached Load, Preprint SFB393/03-06 (Technische Universität Chemnitz, 2003).
3. S. I. Solov’ev, Vibrations of Plates with Masses, Preprint SFB393/03-18 (Technische Universität Chemnitz, 2003).
4. S. I. Solov’ev, Nonlinear Eigenvalue Problems: Approximate Methods (Lambert Acad. Publ., Saarbrücken, 2011) [in Russian].
5. A. V. Gulin and S. V. Kartyshov, “Numerical study of stability and nonlinear eigenvalue problems,” Surv. Math. Ind. 3, 29–48 (1993).