Jonsson, F. (1920) “H. P. Steensby: The Norsemen’s Route from Greenland to Wineland. Kbhvn. 1918. Koppels Forlag”., Geografisk Tidsskrift, 25. Tilgængelig hos: https://tidsskrift.dk/geografisktidsskrift/article/view/47101 (Set: 5 december 2025).