C. W. Oosterlee Hubert Ritzdorf Anton Schüller Barbara Steckel Parallel Multigrid Reesults for Euler Equations and Grid Partitioning into a Large Number of Blocks. 145-150 1994 conf/hpcn/1994-1 HPCN db/conf/hpcn/hpcn1994-1.html#OosterleeRSS94 http://dx.doi.org/10.1007/BFb0020363