Rowson, Ben, and Peter Tattersfield. “Revision of Dadagulella Gen. Nov., the “Gulella Radius group" (Gastropoda: Streptaxidae) of the Eastern Afrotropics, Including Six New Species and Three New Subspecies”. European Journal of Taxonomy0, no. 37 (February 4, 2013). Accessed April 25, 2024. https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/129.