D. S. C. Paciullo, F. Deresz, L. J. M. Aroeira, M. J. F. Morenz, and R. da S. Verneque, “Morphogenesis and leaf biomass accumulation in elephantgrass sward evaluated at diferent period of the year”, PAB, vol. 38, no. 7, pp. 881–887, Jul. 2003.