1. Riddell R Newmark NM Statistical analysis of the response of nonlinear systems subjected to earthquakes Research Report 468, 1979 291
2. Force-deformation models for nonlinear analysis;Riddell;ASCE Journal of Structural Division,1979
3. Clough RW Johnston S Effect of stiffness degradation on earthquake ductility requirements Transactions of Japan Earthquake Engineering Symposium, 1966 195 198
4. An evaluation of inelastic seismic response spectra;Mahin;ASCE Journal of Structural Division,1981
5. Post-earthquake residual displacements of bilinear oscillators;MacRae;Earthquake Engineering & Structural Dynamics,1997