Explicit L 2 inequalities for parabolic and pseudoparabolic equations with Neumann boundary conditions. Kuttler, J.R.; Sigillito, V.G. — 1978 International Journal of Mathematics and Mathematical Sciences
A Finite-Difference Approximation for the Eigenvalue of the Clamped Plate. J.R. KUTTLER — 1971 Numerische Mathematik