World Register of Marine Species (WoRMS)
Tyler, S., Artois, T.; Schilling, S.; Hooge, M.; Bush, L.F. (eds) (2006-2026). World List of turbellarian worms: Acoelomorpha, Catenulida, Rhabditophora. Polycystis hibernica Southern, 1936. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=485644 on 2026-08-29
Southern, R. (1936). Turbellaria of Ireland. Proceedings of the Royal Irish Academy. Section B: Biological, Geological, and Chemical Science. 43: 43-72.