@article{10_4171_ifb_287,
     author = {Nadine Balzani and Martin Rumpf},
     title = {A nested variational time discretization for parametric {Willmore} flow},
     journal = {Interfaces and free boundaries},
     pages = {431--454},
     year = {2012},
     volume = {14},
     number = {4},
     doi = {10.4171/ifb/287},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ifb/287/}
}