Pivetta, L.G., Tomaz-Pivetta, C. de A., Pivetta, L.A., Lara-Fioreze, A.C. da C., Fioreze, S.L. e Zanotto, M.D. 2017. Growth performance of castor bean hybrids under different plant densities. Revista Ceres. 64, 4 (ago. 2017).