Coelho, Joysiene Sanguinete, et al. “Morphophysiology and Nutritive Value of Signalgrass in Silvipastoral System With Different Tree Arrangements”. Semina: Ciências Agrárias, vol. 35, no. 3, June 2014, pp. 1487-00, doi:10.5433/1679-0359.2014v35n3p1487.