1. National Building Code of Canada 1990;NBCC,1990
2. The capacity of extreme earthquake motions to damage structures;Housner,1977
3. Earthquake load for structural reliability;Kuwamura;J. Struct. Engng, ASCE,1989
4. Limit design of structures to resist earthquakes;Housner,1956
5. Towards a simple energy method for seismic design of structures;McKevitt,1979