Hackbusch, W Elliptic differential equations theory and numerical treatment translated form the German by Regine fadiman and Patrick D.F.Ion - New York: Springer-Verlag, 1992. - xiii,311p. Includes bibliography and index eng ISBN: 354054822 Subjects--Topical Terms: Differential equations, Elliptic-Numerical salutions Dewey Class. No.: 515.353 / HAE