@phdthesis{Ritzel2005,
  author      = {Robert M. Ritzel},
  title       = {Migrationsanalyse von Sph{\"a}rischen Pressfit-Pfannen bei H{\"u}ftendoprothesenwechseloperationen},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year        = {2005},
}