@incollection{simek1992kosmos,
  address = {München},
  author = {Simek, Rudolf},
  interhash = {c145d79c10f335723f898e091c1c9608},
  intrahash = {effdb0c80308a4f32fbba1a9c92eddad},
  pages = {95-104},
  title = {Erde und Kosmos im Mittelalter. Das Weltbild vor Kolumbus},
  year = 1992
}

@article{yossef2004medieval,
  author = {Rapoport, Yossef and Savage-Smith, Emilie},
  interhash = {04ac2c501bc8767bba6b19c37c4737b1},
  intrahash = {4562bcb234e93bdc646a9ac6ad260b2e},
  journal = {The Cartographical Journal},
  pages = {253-259},
  title = {Medieval Islamic View of the Cosmos: The Newly Discovered Book of Curiosities},
  volume = 41,
  year = 2004
}