Beobachtungen über die Turbellarien der Inseln von Salowetzk. - Sabussow, H. (Trudy Obshchestva yestestvoispytateley pri Imperatorskom Kazanskom universitete (= Proceedings of the Society of Naturalists at the Imperial Kazan University), 1900)
Russian, with a German abstract and German captions to plates pages 177-203