R. P. Gilbert

From Convexity to Nonconvexity

Constructive Methods for Elliptic Equations

Constructive and Computational Methods for Differential and Integral Equations: Symposium, Indiana University, February 17-20, 1974 (Lecture Notes in Mathematics)

Function Theoretic Methods in Partial Differential Equations

Proceedings of the Second ISAAC Congress : Volume 1

Further Progress in Analysis

Constructive and Computational Methods for Differential and Integral Equations

Advances in Analysis