P. Lizunov, O. Pogorelova, and T. Postnikova, “Dynamic Behavior of the Platform-Vibrator with Soft Impact. Part 3. Effect of Stiffness Parameters. Transient Chaos”, DNC, vol. 12, no. 4, pp. 823–836, Aug. 2026, doi: 10.5890/DNC.2023.12.008.