Ferragine, María del Carmen, et al. “Seasonal Yield, Leaf Area Index and Light Interception of Alfalfa Cultivars under Grazing”. Pesquisa Agropecuaria Brasileira, vol. 39, no. 10, Oct. 2004, pp. 1041-8, doi:10.1590/S1678-3921.pab2004.v39.6873.