Silva, A. B. da; Carvalho, C. A. B.; Pires, C. de A.; Almeida, J. C. de C.; Nepomuceno, D. de D. Effects of Nitrogen Dosage and Urea Source on Morphological Composition and Forage Accumulation in Massai Grass. Semina: Ciênc. Agrár. 2018, 39, 1407-1416.