Nygård, S. The national and the international in "Ultra" (1922) and Quosego (1928): Stefan Nygård. A cultural history of the avant-garde in the Nordic countries 1900 - 1925.(2012).

Nygård, Stefan. "The National and the International in "Ultra" (1922) and Quosego (1928): Stefan Nygård." A Cultural History of the Avant-garde in the Nordic Countries 1900 - 1925.(2012) .

Nygård, Stefan. "The National and the International in "Ultra" (1922) and Quosego (1928): Stefan Nygård." A Cultural History of the Avant-garde in the Nordic Countries 1900 - 1925.(2012), .