1. and , Quantitative Seismology: Theory and Methods, W.H. Freeman Company, San Francisco, 1980.
2. and , “On dispersive properties of finite element solutions,” in Modern Problems in Elastic Wave Propagation, and , Eds., John Wiley & Sons, New York, 1978, p. 67.
3. “Finite-difference methods for seismic wave propagation in heterogeneous materials,” in Methods of Computational Physics, II, Ed., Academic Press, New York, 1972.