London Mathematical Society Student Texts: Laplacian on a Riemannian Manifold :

Operator Methods for Boundary Value Problems 404 Paperback 9781107606111

Boundary Value Problems by David L. Powers (1999, Hardcover)

Elementary Differential Equations Boundary Value Problems 10th Ed Wiley NEW

Proceedings of the London Mathematical Society, Vol. 19 (Classic Reprint)

Variational Methods For Boundary Value Problems For Systems Of Elliptic Equation

Bernoulli Free-boundary Problems (Memoirs of the American Mathematical Society)

Operator Methods for Boundary Value Problems - 9781107606111