@inbook{30350,
  author = {John North},
  editor = {Walter R{\"u}egg},
  title = {Das quadrivium},
  year = {1993},
  journal = {Geschichte der Universit{\"a}t in Europa},
  pages = {303{\textendash}320},
  publisher = {Beck},
  address = {M{\"u}nchen},
  isbn = {978-3-406-36956-1},
  language = {eng},
}