Taylor, M. E.: Partial Differential Equations. I: Basic Theory. New York etc., Springer 1996. XXI, 563 pp., DM 98.00. ISBN 0-387-94653-5 (Applied Mathematical Sciences 115). Partial Differential Equations. II: Qualitative Studies of Linear Equations. New York etc., Springer 1996. XXI, 528 pp., DM 98.00. ISBN 0-387-94651-9 (Applied Mathematical Sciences 116). Partial Differential Equations. III: Nonlinear Equations. New York etc., Springer 1996. XXI, 610 pp., DM 98,00. ISBN 0-387-94652-7 (Applied Mathematical Sciences 117)