1. Arma models for earthquake ground motions
2. Simulating and analyzing artificial nonstationary earthquake ground motions
3. ‘Estimation and modeling of nonstationary time series’, Proc. conf. applic. comput. methods civil eng. Los Angeles, CA, 603–612 (1977).
4. and , ‘Modeling earthquake ground motions using parametric time series methods’, Technical Report No. NCEER-87–0014, NCEER, Buffalo, NY, 1978.