1. Private communication from Bridge Design Office of New Zealand Railways.
2. and , ‘Energy absorption devices for earthquake resistant structures’, Proc. 5th Wld Conf. Earthq. Engng, Rome, Session 8c (1973).
3. and , ‘Study of the overturning vibration of slender structures’, Proc. 2nd Wld Conf. Earthq. Engng, Tokyo, 2, 1239–1261 (1960).
4. ‘Seismic Response of a Proposed Railway Viaduct’, M.E. Thesis, University of Canterbury, New Zealand, 1970.