An additive Schwarz preconditioner for the spectral element ocean model formulation of the shallow water equations. Douglas, Craig C.; Haase, Gundolf; Iskandarani, Mohamed — 2003 ETNA. Electronic Transactions on Numerical Analysis [electronic only]
Cache optimization for structured and unstructured grid multigrid. Douglas, Craig C.; Hu, Jonathan; Kowarschik, Markus; Rüde, Ulrich; Weiss, Christian — 2000 ETNA. Electronic Transactions on Numerical Analysis [electronic only]