1. A. Stephenson: On induced stability. Philosophical Magazine Vol. 15 (1908), pp.233-236.
2. I.I. Blekhman: Vibrational Mechanics - Nonlinear Dynamic Effects, General Approach, Applications (World Scientific, Singapore, 2000) Fig. 4. Chelomei's pendulum.
3. J.S. Jensen: Non-trivial effects of fast harmonic excitation (Ph.D. Thesis, Department of Solid Mechanics, Technical University of Denmark. DCAMM Report S83, 1999).
4. A. Fidlin: On the Oscillations in Discontinuous and Unconventionally Strong Excited Systems: Asymptotic Approaches and Dynamic Effects (Doctoral dissertation, University of Karlsruhe, Dept. of Mechanical Engineering, 2002).
5. J.J. Thomsen: Dynamic Effects of Nonlinearity and Fast Vibrations: Stiffening, Biasing, Smoothening, Chaos (Doctoral dissertation, Technical University of Denmark, 2003).