Haga T. & Hasegawa K. (2017). The overlooked diversity: occurrence of a microscopic gastropod
Pelycidion (Mollusca: Caenogastropoda: Pickworthiidae) from the Middle Pleistocene Toyohashi Formation, Atsumi Group, central Honshû, Japan.
Science Report of Toyohashi Museum of Natural History. 27: 9-16.