A Multigrid Method for a Fourth-Order Diffusion Equation with Application to Image Processing.

Stefan Henn A Multigrid Method for a Fourth-Order Diffusion Equation with Application to Image Processing. 831-849 2005 27 SIAM J. Scientific Computing 3 http://dx.doi.org/10.1137/040611124 db/journals/siamsc/siamsc27.html#Henn05