1. and , ‘Dynamic stiffness and seismic response of pile groups’, Research Report R82–03, Massachusetts Institute of Technology Cambridge, Mass., 1982.
2. and , ‘Seismic response analysis of pile-supported structure: assessment of commonly used approximations’, Proc. 2nd int. conf. recent adv. geotech. earthquake eng. soil dyn. St. Louis 931–940 (1991).
3. and , ‘Dynamic and static response of pile groups’, Proc. 12th int. conf. soil mech. found. eng. Rio de Janerio 1175–1178 (1989).