Read, V. M. St J.; Hughes, R. N. (22. mai 1987). «Feeding Behaviour and Prey Choice in Macroperipatus torquatus (Onychophora)». Proceedings of the Royal Society of London. Series B, Biological Sciences. 230 (1261): 483–506. Bibcode:1987RSPSB.230..483R. JSTOR36199. doi:10.1098/rspb.1987.0030.
Walker, Muriel H.; Tait, Noel N. (desember 2004). «Studies of embryonic development and the reproductive cycle in ovoviviparous Australian Onychophora (Peripatopsidae)». Journal of Zoology. 264 (4): 333–54. doi:10.1017/S0952836904005837.
harvard.edu
adsabs.harvard.edu
Read, V. M. St J.; Hughes, R. N. (22. mai 1987). «Feeding Behaviour and Prey Choice in Macroperipatus torquatus (Onychophora)». Proceedings of the Royal Society of London. Series B, Biological Sciences. 230 (1261): 483–506. Bibcode:1987RSPSB.230..483R. JSTOR36199. doi:10.1098/rspb.1987.0030.
jstor.org
Read, V. M. St J.; Hughes, R. N. (22. mai 1987). «Feeding Behaviour and Prey Choice in Macroperipatus torquatus (Onychophora)». Proceedings of the Royal Society of London. Series B, Biological Sciences. 230 (1261): 483–506. Bibcode:1987RSPSB.230..483R. JSTOR36199. doi:10.1098/rspb.1987.0030.
uio.no
mn.uio.no
Halvor Aanes, Rekke leddyr (Arthropoda), oversikt over grupper, Universitetet i Oslo, besøkt 15. mars 2014.