Bibliografisk träff 2009-12-01 Effects of isovalerate on ruminal fermentation, urinary excretion of purine derivatives and digestibility in steers. Liu Q, Wang C, Huang YX, Dong KH, Yang WZ, Zhang SL, Wang H. J Anim Physiol Anim Nutr (Berl) · controlled clinical trial; research support, non-u.s. gov't; journal article · DOI 10.1111/j.1439-0396.2008.00861.x