A Conjectured Heat Flow Problem (M. S. Klamkin). - Robert Gulliver; N. Brad Willms; B. Kawohl (SIAM Rev., 1995)

On the Differential Equation uxxxx + uyyyy = f for an Anisotropic Stiff Material. - B. Kawohl; Guido Sweers (SIAM J. Math. Anal., 2006)