Lectures on partial and Pfaffian differential equations
by Wolfgang Haack and Wolfgang Wendland ; translated by E. R. Dawson ; English translation edited by W. N. Everitt
Pergamon Press, c1972
[1st English ed.]
Vorlesungen über partielle und Pfaffesche Differentialgleichungen
Vorlesungen über partielle und Pfaffesche Differentialgleichungen