Kim, B. G. and H. H. Stein. 2010. Energy concentration and phosphorus digestibility in yeast products, fish meal, and soybean meal fed to growing pigs. J. Anim. Sci. 88(E-Suppl. 3):86 (Abstr.) Link to abstract (.pdf)
Stein, H. H., M. L. Gibson, M. G. Boersma, and C. Pedersen. 2005. Digestibility of CP, AA, and energy in a novel yeast product by pigs. J. Anim. Sci. 83(Suppl. 1):35 (Abstr.) Link to abstract (.pdf)
Mateo, C. D., and H. H. Stein. 2007. Apparent and standardized ileal digestibility of amino acids in yeast extract and spray dried plasma protein by weanling pigs. Can. J. Anim. Sci. 87:381-383. Link to full text (.pdf)