World Register of Marine Species (WoRMS)
Norenburg, J.; Chernyshev, A.; Kajihara, H.; Maslakova, S. (2026). World Nemertea Database. Oerstedia polyorbis Iwata, 1954. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=162307 on 2026-08-02
Iwata, F. (1954). The fauna of Akkeshi Bay. XX. Nemertini in Hokkaido. Journal of the Faculty of Science Hokkaido University Series 6: Zoology, 12: 1-39