Template:Riser, 1991
- Riser, N.W. 1991. New Zealand nemertines from kelp holdfasts: Heteronemertinea II. Notospermus geniculatus (Delle Chiaje, 1828) n. comb. New Zealand journal of zoology 18(4): 427–438. DOI: 10.1080/03014223.1991.10422849 Google books