2136 2007 2007 eng 547 554 50 conferenceobject 0 -- -- -- Solving Frictional Contact Problems with Multigrid Efficiency Proc.of the 16th International Conference on Domain Decomposition Methods Lecture Notes in Computational Science and Engineering Konstantin Fackeldey Olof Widlund Rolf Krause Numerical Mathematics Computational Molecular Design Fackeldey, Konstantin