%0 Journal Article %A Birken, Philipp %T Optimizing Runge-Kutta smoothers for unsteady flow problems %J Electronic transactions on numerical analysis %D 2012 %P 298-312 %V 39 %I mathdoc %U http://geodesic.mathdoc.fr/item/ETNA_2012__39__a9/ %G en %F ETNA_2012__39__a9