World Register of Marine Species (WoRMS)
WoRMS (2026). Polycystididae Graff, 1905. Accessed at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=142099 on 2026-08-29
Graff, L. von. (1905). Marine Turbellarien Orotavas und der Küsten Europas. II. Rhabdocoela. Zeitschrift fur wissenschaftliche Zoologie. 83: 68-150. With 5 plates.