Termitenstudien. 2. Systematik der Termiten. Die Familien Mastotermitidae, protermitidae und MesotermitidaePublished in Kungliga Svenska Vetenskaps-Akademiens Handlingar, in 1911, in volume 46, issue 6, pages 1-86Priapulids and sipunculids dredged by the Swedish Antarctic Expedition 1901-1903, and the phenomenon of bipolarityPublished in Kongliga Svenska Vetenskaps Academiens Nya Handlingar, Stockholm, in 1911, in volume 47, pages 1-36
Priapulids and sipunculids dredged by the Swedish Antarctic Expedition 1901-1903, and the phenomenon of bipolarityPublished in Kongliga Svenska Vetenskaps Academiens Nya Handlingar, Stockholm, in 1911, in volume 47, pages 1-36