^ 1.01.1De Smet, Antoine "Monumenta Cartographica Vetustioris Aevi, Vol. I. Mappaemundi. Mappemondes A. D. 1200–1500. Catalogue préparé par la Commission des Cartes Anciennes de l'Union Géographique Internationale by Marcel Destombes" Imago Mundi Vol. 22 (1968), pp. 121–126
^Edson, Evelyn The World Map, 1300–1492 The Johns Hopkins University Press; illustrated edition (30 May 2007) ISBN978-0-8018-8589-1 p. 88
^Seaver, Kirsten "Cartographic controversy: Albertin de Virga and the Far North" Mercator's World 2:6, 1997
^Edson, Evelyn, The world map, 1300-1492. The persistence of tradition and transformation. Johns Hopkins University Press, London 2007, ISBN0-8018-8589-2, pp. 76, 252.