EBRAHIMI, S.H. et al. 2015. Effects of fumaric or malic acid and 9, 10 anthraquinone on digestibility, microbial protein synthesis, methane emission and performance of growing calves. The Indian Journal of Animal Sciences. 85, 9 (Sep. 2015), 1000–1005. DOI:https://doi.org/10.56093/ijans.v85i9.51739.