Ammonia production by rumen microorganisms and the enumeration and isolation of bacteria capable of growth on peptides and amino acids from the sheep rumen S. Eschenlauer, CJ Newbold, N. McKain, ND Walker and RJ WallaceReprod. Nutr. Dev., 37 Suppl. 1 (1997) 63-64DOI: https://doi.org/10.1051/rnd:19970745