↑ Belcher, Vol. I, tại Google Books; trích dẫn trang 317, "On the 16th, we endeavoured to obtain observations on Tia-usu; a landing was effected, but the absence of sun prevented our obtaining satisfactory observations, and bad weather coming on hastened our departure. This group, comprehending Hoa-pin-san (Uotsuri Jima), Pinnacle Rocks, and Tias-usu (Kuba Jima), form a triangle, of which the hypothenuse, or distance between Hoa-pin-san and Tia-usu, extends about fourteen miles, and that between Hoa-pinsan and the Southern Pinnacle, about two miles."
↑ Porcasi, Judith F. (1999). "Prehistoric Exploitation of Albatross on the Southern California Channel Islands," Journal of California and Great Basin Anthropology. Vol. 21 (1), pp. 109, citing Hasegawa, Hiroshi. (1979). "Status of the Short-tailed Albatross of Torishimia and in the Senkaku Retto in 1978/79. Pacific Seabird Group Bulletin 6:23–25; and Hasegawa, Hiroshi and Anthony R. Degange. (1982). "The Short-tailed Albatross, 'Diamedea albatrus, Its Status, Distribution and Natural History." American Birds, 36(5):806–814.
