1. Stability of prismatic rods subjected to variable longitudinal forces;Beliaev,1924
2. V.V. Bolotin, Dynamic Stability of Elastic Systems, Moscow 1956, 68-93: English translation by Holden-Day 1964.
3. Effects of longitudinal inertia upon the parametric response of elastic columns;Evensen;Transactions of ASME, Journal of Applied Mechanics,1966
4. L.G. Jaeger, A.D.S. Barr, Parametric instabilities of a vertical elastic cantilever oscillated vertically, Proceedings of the 1st Canadian Applied Mechanics Conference, Quebec, 1967.
5. Parametric instability of a cantilevered column with end mass;Handoo;Journal of Sound and Vibration,1971