Pseudo-differential operators

S. Agmon: Asymptotic formulas with remainder estimates for eigenvalues of elliptic operators.- J. Bokobza-Haggiag: Une définition globale des opérateurs pseudo-différentiels sur une variété différentiable.- L. Boutet de Monvel: Pseudo-differential operators and analytic function.- A. Calderon: A priori estimates for singular integral operators.- B. F. Jones: Characterization of spaces of Bessel potentials related to the heat equation.- J. J. Kohn: Pseudo-differential operators and non-elliptic problems.- R. T. Seeley: Topics in pseudo-differential operators.- I. M. E. Shamir: Boundary value problems for elliptic convolution systems.- Singer: Elliptic operators on manifolds.