Comments on "An Extension to Gradient Matrices". - Robert G. Rains; William J. Vetter (IEEE Trans. Syst. Man Cybern., 1972)

A raypath reflection model for layered media with source and receiver in different layers. - William J. Vetter (ICASSP, 1980)

Impulse response for the one-dimensional inhomogeneous medium with an approximation for attenuation and dispersion. - William J. Vetter (ICASSP, 1982)

The array matrix generalization for signal processing. - William J. Vetter (ICASSP, 1986)

Extended matrix formulation for the Marple algorithm. - William J. Vetter; Milton J. Porsani (ICASSP, 1987)