Uemura K., Tanai T., 1993: Betulaceous leaves and fruits from the Oligocene of Kitami, Hokkaido, Japan. 9 pp. (in English). Memoirs of the National Science Museum 26: 21-29.
 
BOT 280
Uemura L., 1991: Middle miocene plant megafossil assemblages from Onnebetsu and Niupu in the Nayoro area, Hokkaido. 10 pp. (in Japanese). Memoirs of the National Science Museum 24: 17-26.
 
PSC 212
Uyeno T., Matsui N., 1993: Late Cretaceous fish fossils from Nemuro, Hokkaido, Japan. 8 pp. (in Japanese). Memoirs of the National Science Museum 26: 39-46.