1. Linear vibration of thin-walled beams of equal angle-section;Hasan;Journal of Sound and Vibration,1972
2. Parametric (dynamic) stability of elastic systems;Evan-Iwanowski,1963
3. On the parametric response of structures;Evan-Iwanowski;Applied Mechanics Review,1965
4. Parametric instabilities in structures subjected to prescribed support motion;Jaeger,1966