Czerniavsky, Voldemaro. (1882). Materialia ad zoographiam Ponticam comparatam. Fasc. III Vermes. [third part]. Bulletin de la Société Impériale des naturalistes de Moscou (= Byulletin' Moskovskogo obshchestva ispytatelei prirody). 57(1): 146-198., available online at http://biodiversitylibrary.org/page/34267696
