BioStor
 | Oligochaeta Wilhelm Michaelsen (1900) Das Tierreich 10: 1-575 |
 | Die geographische Verbreitung der Oligochaeten W Michaelsen (1903) |
 | Zoological Results of the Third Tanganyika Expedition, conducted by Dr. W. A. Cunnington, 1904-1905. Report on the Macrurous Crustacea W T Calman (1906) Proceedings of the Zoological Society of London 1906: 187-206 |