Published in Arkiv for Zoologi Stockholm, in 1921, in volume 14, issue 4, pages 1-104
Published in Arkiv för Zoologi, in 1921, in volume 13, pages 1-10
Published in Arkiv för Zoologi, in 1921, in volume 13, issue 19, pages 1-25
Published in Arkiv för Zoologi, in 1921, in volume 13, pages 1-6