Matsumaru, K. and Kimura, K., 1989: Larger foraminifera from the Eocene Shumizu and Miocene Misaki Formations in Tosa Shimizu City, Kochi Prefecture, Shikoku, Japan. Transactions and Proceedings of the Paleontological Society of Japan, New Series, no. 156, p. 255-269.
Matsumaru, K. and Kimura, K., 1989: Larger foraminifera from the Eocene Shumizu and Miocene Misaki Formations in Tosa Shimizu City, Kochi Prefecture, Shikoku, Japan. Transactions and Proceedings of the Paleontological Society of Japan, New Series, no. 156, p. 255-269