E. V. Sampaio, I. H. Salcedo, and J. Bettany, “Nutrient cycling in sugarcane. I. Plant recovery of N from single or split urea (15N) application”, PAB, vol. 19, no. 8, pp. 943–949, Apr. 2014, doi: 10.1590/S1678-3921.pab1984.v19.15991.