Factors affecting de novo synthesis of amino acids by mixed microorganisms from the sheep rumen in vitro and by pure cultures of rumen bacteria C. Atasoglu, C. Valdés, ND Walker, CJ Newbold and RJ WallaceReprod. Nutr. Dev., 37 Suppl. 1 (1997) 62-63DOI: https://doi.org/10.1051/rnd:19970744