Spectral techniques and fault detection

Spectra and the Steenrod algebra modules over the Steenrod algebra and the stable homotopy category

Spectral theory of differential operators proceedings of the conference held at the University of Alabama in Birmingham, Birmingham, Alabama, U.S.A., March 26-28, 1981

Spectral theory and asymptotics of differential equations proceedings of the Scheveningen Conference on Differential Equations, the Netherlands, September 3-7, 1973

Locally compact semi-algebras With applications to spectral theory of positive operators.

Spectral theory and complex analysis