Tveito, Aslak . Introduction to partial differential equations: a computational approach / by Aslak Tveito and Ragnar Winther. - New York : Springer-Verlag , 2005 - 392p : ISBN: 978-81-8489-480-6 Subjects--Topical Terms: Mathematics, Equations, Partial differential Dewey Class. No.: B23 / P5