V. N.  Beklemischev, ?Sur les turbellariés parasites de la cote Mourmanne. I. Acoela. [In Russian, French summary] [On parasitic turbellarians of the Mourmansk coast. I. Acoela.  II. Rhabdocoela]?, Trav Soc Imp Naturalistee Petrograd, vol. 43, pp. 103 - 172, 1915.