↑ A History of Norwegian Literature(by Harald Beyer; New York University Press, 1956) ↑ Olav Duun (Store norske leksikon) ↑ "Nomination Database". www.nobelprize.org. Retrieved 2017-01-23. ↑ Grethe F. Syéd med glitrende bok om Olav Duun ↑ Olav Duun -- Britannica Online Encyclopedia at www.britannica.com ↑ Twentieth Century Authors: A Biographical Dictionary of Modern Literature, (edited by Stanley J. Kunitz and Howard Haycraft, New York, The H. W. Wilson Company, 1942) ↑ House of Olav And Emma Duun