HOFMANN, RR. The ruminant stomach (stomach structure and feeding habits of east African game ruminants). East African Monographies on Biology. 1973, 2
HOFMANN, RR. Evolutionary steps of ecophysiological adaptation and diversification of ruminants : a comparative view of their digestive system. Oecologia. 1989, 78, 443-457
Hokkaido Branch of Forestry and Forest Products Research Institute. Distribution map of the Sasa group in Hokkaido. 1983