1. Beiträge Zum Dynamischen Ausbau Der Festigkeitslehe (contribution to dynamic expansion of strength);Sommerfeld;Phys. Zeitschr.,1902
2. Vibrating System with Limited Excitation[in Russian];Kononeko,1964
3. Nonlinear Oscillations;Nayfeh,1979
4. Chaos in vibrating systems with a limited power-supply;Krasnopolskaya;Chaos,1993
5. Spinup dynamics of axial dual-spin spacecraft;Hall;J. Guid. Control Dyn.,1994