1. Akiyama, M., 1957a, Amussiopecten iitomiensis(Otuka) and its allies from Japan. Trans. Proc. Palaeont. Soc. Japan, N.S., 25, 31–39.
2. 秋山雅彦, 1957b, 山梨県富士川上流域の新第三紀層の層序と地質構造について.地質雑, 63, 669–683. [Akiyama, M., 1957b, The Neogene strata along the upper course of the Fujikawa River, Yamanashi Prefecture, Japan. J. Geol. Soc. Japan, 63, 669–683.]
3. 馬場勝良, 1990, 関東地方南部, 上総層群の貝化石群.慶応義塾幼稚舎, 445p. [Baba, K., 1990, Molluscan Fossil Assemblages of the Kazusa Group, South Kwanto, Central Japan. Keio Gijyuku Yochisha, 445p.]
4. 馬場勝良, 1992, 神奈川県北部中津層群の貝化石群.瑞浪市化石博物館研究報告, 19, 529–541. [Baba, K., 1992, Molluscan fossil assemblages from the Nakatsu Group, Kanagawa Prefecture, central Japan. Bull. Mizunami Fossil Mus., 19, 529–541.]
5. Backman, J., Raffi, I., Rio, D., Fornaciari, E. and Pälike, H., 2012, Biozonation and biochronology of Miocene through Pleistocene calcareous nannofossils from low and middle latitudes. Newsl. Stratigr., 45, 221–244.