V. Flint. Medieval Ethnographies. European Perceptions of the World Beyond, Volume 9 von The Expansion of Latin Europe, 1000-1500, Farnham/ Burlington, (2009)
B. Hamilton. Medieval Ethnographies. European Perceptions of the World Beyond, Volume 9 von The Expansion of Latin Europe, 1000-1500, Farnham, Burlington, (2009)
J. Le Goff. Medieval Ethnographies. European Perceptions of the World Beyond, Volume 9 von The Expansion of Latin Europe, 1000-1500, Farnham, Burlington, (2009)
G. Amiotti. Il confine del mondo classicoIl confine del mondo classico, Milano, Zusätzlich in Reihe: Contributo dell’Instituto di Storia antica 13.(1987)