González, Félix, et al. “Milk Yield and Reproductive Performance of Dairy Heifers and Cows Supplemented With Polyunsaturated Fatty Acids”. Pesquisa Agropecuaria Brasileira, vol. 50, no. 4, Apr. 2015, pp. 306-12, https://doi.org/10.1590/S1678-3921.pab2015.v50.19692.