Reference

Sid Staubach, Annette Klussmann-Kolb (2007): The cephalic sensory organs of Acteon tovnatilis (Linnaeus, 1758) (Gastropoda Opisthobranchia) - cellular innervation patterns as a tool for homologisation – Bonn zoological Bulletin - früher Bonner Zoologische Beiträge. – 55: 311 - 318.