Stormark, Olle Lie’s structural approach to PDE systems / Olle Stormark - New York : Cambridge University Press, c2000 - xv, 572 p. ; 24 cm. - Encyclopedia of mathematics and its applications ; 80 . - Encyclopedia of mathematics and its applications . Includes bibliographical references and index ISBN: 9780521780889 0521780888 Subjects--Topical Terms: Differential equations, Partial--Numerical solutions