M.  Kawakatsu, Sluys, R., Timoshkin, O. A., Naumova, T. V., Nishino, M., and Takai, M., ?Redescription of Japanese Bdellocephala annandalei from Lake Biwa-ko with comparative redescription of the Far Eastern and Kamchatkan Bdellocephala species (Tricladida, Paludicola)?, Belgian Journal of Zoology, vol. 131, pp. 205-211, 2001.