@phdthesis{Ullrich2018,
  author      = {Andr{\´e} Ullrich},
  title       = {Eigenschaften wandlungsf{\"a}higer Systeme},
  type        = {doctoralthesis},
  pages       = {XIX, 403},
  school      = {Universit{\"a}t Potsdam},
  year        = {2018},
}