Yisehak, Kechero, et al. “Salivary Amino Acid Concentrations in Zebus (Bos Indicus) and Zebu Hybrids (Bos Indicus × Bos Taurus) Fed a Tannin-Rich Diet”. Belgian Journal of Zoology, vol. 141, no. 2, Mar. 2024, pp. 93-96, doi:10.26496/bjz.2011.142.