@phdthesis{Zopfi2018,
  author      = {Stephan Zopfi},
  title       = {Die t{\"a}gliche Bewegungs- und Sportstunde},
  type        = {doctoralthesis},
  pages       = {185},
  school      = {Universit{\"a}t Potsdam},
  year        = {2018},
}