%0 Journal Article %J ICCS 2012 %D 2012 %T Block-asynchronous Multigrid Smoothers for GPU-accelerated Systems %A Hartwig Anzt %A Stanimire Tomov %A Mark Gates %A Jack Dongarra %A Vincent Heuveline %B ICCS 2012 %C Omaha, NE %8 2012-06 %G eng