@phdthesis{Welker2017,
  author      = {Kathrin Welker},
  title       = {Efficient PDE Constrained Shape Optimization in Shape Spaces},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t Trier},
  doi       = {10.25353/ubtr-xxxx-6575-788c/},
  year        = {2017},
}