Shirmohammadi, S. et al. 2022. Effect of amino acid supplementation and choline chloride for low protein diet on nitrogen efficiency and methane emission of dairy cows. Semina: Ciências Agrárias. 43, 1 (Jan. 2022), 159–178. DOI:https://doi.org/10.5433/1679-0359.2022v43n1p159.