Digestion Kinetics in Ruminants. Church: 145-170 Van Soest: 354-370; 371-384 Sejrsen et al. pp. 87-126 Firkins, J. L., M. S. Allen, B. S. Oldick, and N.R. St-Pierre. 1998. Modeling ruminal digestibility of carbohydrates and microbial protein flow to the duodenum. J. Dairy Sci. 81:3350-3369