Imaizumi, Hugo, et al. “Protein and Starch Sources Varying in Rumen Degradability to Feed Dairy Cows”. Pesquisa Agropecuaria Brasileira, vol. 41, no. 9, Sept. 2006, pp. 1413-20, doi:10.1590/S1678-3921.pab2006.v41.7297.