Research on milk yield and nursing ability in Japanese Black (Wagyu) cows.

Shimada, K., Izaike, Y., Suzuki, O., Okano, A., Takenouchi, N., Ohshima, K., Oishi, O., Kosugiyama, M., Takahashi, M., (1993). Bulletin of the Chugoku National Agricultural Experiment Station(No. 12), 57-123. Japanese language

Effects of breed, calf age, sex, parity and season on suckling behaviour in beef cattle.

Shimada, K., Izaike, Y., Suzuki, O., Kosugiyama, M., (1989). Japanese Journal of Zootechnical Science 60(10), 908-915. Japanese language