Yamaoka, T. (1947). Emplectonema mitsuii Yamaoka, Paranemertes katoi Yamaoka, Amphiporus ogumai Yamaoka, Prostoma roseocephalum Yamaoka, as submitted by S Okuda. In: Uchida, S., ed. Illustrated Encyclopedia of the Fauna of Japan (Exclusive of Insects). The Hokuryukan Co. Ltd., pp. 1466–1469