Literature
- Erséus, C., Omodeo, P. & Rota, E. 1994. First records of the allochthonous species Dichogaster saliens and D. bolaui (Oligochaeta: Octochaetidae) from Sweden. Megadrilogica 6(2): 17-20.
- Michaelsen, W. 1891. Oligochaeten des Naturhistorischen Museum in Hamburg. IV. Jahrbuch der Hamburgischen Wissenschaftlichen Anstalt 8: 3-42.
- Sims, R.W. & Gerard, B.M. 1985. Earthworms. Synopses of the British Fauna (New Series) 31. Brill & Backhuys, London etc. 171 p.
- Terhivuo, J. 1991. Dichogaster bolaui (Michaelsen) (Octochaetidae) - an allochthonous oligochaet invading urban sewer system. Memoranda Societatis pro Fauna et Flora Fennica 67: 61-65.