1. Anderson , A.R. 1932. “Alexander's gate, Gog and Magog and the inclosed nations”. Cambridge, Massachusetts
2. Arens , W. 1979. “The man-eating myth”. New York
3. Arentzen , J.G. 1984. “Imago mundi cartographica”. München
4. Bagrow , L. and Skelton , R.A. 1985. “Meister der Kartographie”. Berlin
5. Beckingham , C.F. 1966. “The achievements of Prester John”. Oxford