E. J.  De Vries, ?The biogeography of the genus Dugesia (Turbellaria, Tricladida, Paludicola) in the Mediterranean region?, Journal of Biogeography, vol. 12, pp. 509-518, 1985.

M.  Kawakatsu, Oki, I., Tamura, S., and Yamayoshi, T., ?Reexamination of freshwater planarians found in tanks of tropical fishes in Japan, with a description of a new species, Dugesia austroasiatica sp. nov. (Turbellaria; Tricladida; Paludicola)?, Bulletin of the Biogeographical Society of Japan, vol. 40, pp. 1-19, 1985.