@ARTICLE{DrRu04b,
  author = {Droske, M. and Rumpf, M.},
  title = {A level set formulation for {Willmore} flow},
  journal = {Interfaces and Free Boundaries},
  year = {2004},
  volume = {6},
  pages = {361--378},
  number = {3},
  abstract = {A level set formulation of Willmore flow is derived using the gradient
	flow perspective. Starting from single embedded surfaces and the
	corresponding gradient flow, the metric is generalized to sets of
	level set surfaces using the identification of normal velocities
	and variations of the level set function in time via the level set
	equation. The approach in particular allows to identify the natural
	dependent quantities of the derived variational formulation. Furthermore,
	spatial and temporal discretization are discussed and some numerical
	simulations are presented.},
  digital = {1},
  pdf = {http://numod.ins.uni-bonn.de/research/papers/public/DrRu04b.pdf}
}