Hörmander L. The Analysis of Linear Partial Differential Operators III: Pseudo-Differential Operators

Springer, 2007. — 537 p.Volumes III and IV complete L. Hörmander's treatise on linear partial differential equations. They constitute the most complete and up-to-date account of this subject, by the author who has dominated it and made the most significant contributions in the last decades...It is a superb book, which must be present in every mathematical library, and an indispensable tool for all - young and old - interested in the theory of partial differential operators.
L. Boutet de Monvel.