@inproceedings{FackeldeyKrause2007, author = {Konstantin Fackeldey and Rolf Krause}, title = {Solving Frictional Contact Problems with Multigrid Efficiency}, booktitle = {Proc.of the 16th International Conference on Domain Decomposition Methods}, editor = {Olof Widlund}, volume = {50}, pages = {547 -- 554}, year = {2007}, }