@inproceedings{Krause.Fackeldey:2005, author = {K. Fackeldey and R. Krause}, title = {{Solving Frictional Contact Problems with Multigrid Efficiency}}, booktitle = {Proceedings of the 16th Internationall. Conference on Domain Decomposition}, year = {2005}, address = {New York}, note = {to appear. Also available as INS Preprint No 0601}, inspreprintnum = {0601} }