@phdthesis{Achenbach2003,
  author      = {Tobias Achenbach},
  title       = {Evaluationsinstrumentarium f{\"u}r die pr{\"a}ventive R{\"u}ckenschule zu Pferde : Entwicklung und empirische {\"U}berpr{\"u}fung},
  type        = {doctoralthesis},
  school      = {Universit{\"a}tsbibliothek Johann Christian Senckenberg},
  year        = {2003},
}