Published in Arkiv For Zoologi, in 1903, in volume 1, pages 157-169

Published in Arkiv For Zoologi, in 1903, in volume 1, pages 223-234

Published in Arkiv för Zoologi, in 1903, in volume 1, pages 329-381

Published in Arkiv For Zoologi, in 1903, in volume 1, issue 8, pages 181-196