Vamberger, M. and Trontelj, P. 2007. Placobdella costata (Fr. Müller, 1846) (Hirudinea: Glossiphoniidae), a leech species new for Slovenia. Natura Sloveniae. 9, 1 (Jun. 2007), 37–42. DOI:https://doi.org/10.14720/ns.9.1.37-42.