books.google.it - A systematic introduction to partial differentialequations and modern finite element methods for their efficient numerical solutionPartial Differential Equations and the Finite Element Method provides a much-needed, clear, and systematic introduction to modern theory of partial differential equations...http://books.google.it/books/about/Partial_Differential_Equations_and_the_F.html?hl=it&id=AgWFqIKbeBUC&q=constant&utm_source=gb-gplus-sharePartial Differential Equations and the Finite Element Method
