Coêlho, Janerson José, et al. “Prediction of the Nutritional Value of Grass Species in the Semiarid Region by Repeatability Analysis”. Pesquisa Agropecuaria Brasileira, vol. 53, no. 3, May 2018, pp. 378-85, doi:10.1590/S1678-3921.pab2018.v53.25401.