1. and , The Venezuela Earthquake, July 29, 1967, American Iron and Steel Institute, New York, 1969.
2. and , ‘Parametric instability in structures under support motions’, Symp. Struct. Dyn., Loughborough University of Technology, pp. E.4.1.–E.4.19, 1970.
3. Parametric Vibration Response of Columns
4. The dynamic stability of a uniform straight column excited by a pulsating load