@phdthesis{Offenberger2005,
  author      = {Pia Offenberger},
  title       = {Konfliktbew{\"a}ltigung und Freundschaft in der mittleren Kindheit},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t Potsdam},
  year        = {2005},
}