Reference

Andrezej Falniowski, Magdalena Szarowska, Krystyna Mazan (1996-1997): Shell SEM outer and inner structure and rissoacean phylogeny VII: Hydrobia ulvae ( Pennant) (Gastropoda: Prosobranchia: Rissoacea: Hydrobiidae) – Malakologische Abhandlungen – 18: 25 - 33.