%0 Journal Article %A Marc Droske %A Martin Rumpf %T A level set formulation for Willmore flow %J Interfaces and free boundaries %D 2004 %P 361-378 %V 6 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4171/ifb/105/ %R 10.4171/ifb/105 %F 10_4171_ifb_105