D. W. Bohnert, Delcurto, T., Clark, A. A., Merrill, M. L., Falck, S. J., and Harmon, D. L.,
“Protein supplementation of ruminants consuming low-quality cool- or warm-season forage: differences in intake and digestibility.”,
Journal of Animal Science, vol. 89, no. 11, pp. 3707-17, 2011.