@incollection{potthast1990iohannes,
  address = {Rom},
  author = {Potthast, August},
  booktitle = {Repertorium fontium historiae medii aevi},
  editor = {Potthast, August},
  interhash = {0063babd00642df5c019e3276fd79828},
  intrahash = {8d27ec324f5886f742f3e39fa36e5378},
  pages = 429,
  title = {Iohannes presbyter Wirceburgensis},
  volume = 6,
  year = 1990
}

@incollection{bernard2009continental,
  address = {Farnham, Burlington},
  author = {Hamilton, Bernard},
  booktitle = {Medieval Ethnographies. European Perceptions of the World Beyond},
  editor = {Rubiés, Joan-Pau},
  interhash = {81396e1e860f6f974cdc5209fec6b3e4},
  intrahash = {e53487d4626de0086139258143d10480},
  pages = {121-153},
  series = {The Expansion of Latin Europe, 1000-1500},
  title = {Continental Drift: Prester John’s Progress through the Indies},
  volume = 9,
  year = 2009
}

@incollection{WAWRIK,
  address = {Wien},
  author = {Wawrik, Franz},
  booktitle = {Johannes von Gmunden (ca. 1384-1442). Astronom und Mathematiker},
  editor = {Simek, Rudolf and Chlench, Kathrin},
  interhash = {9a5cf7d7a5e6422ffd910807e7b80f5f},
  intrahash = {0ad59f7e08cf1fe2e58905ef983747ea},
  pages = {45-62},
  series = {Studia Medievalia Septentrionalia 12},
  title = {Die Beeinflussung der frühen Kartographie durch Johannes von Gmunden und seinen Kreis},
  year = 2006
}