de Carvalho, Marco Antonio Camillo, et al. “Yield of Corn Grown After Green Manures under No-Tillage and Conventional Management System”. Pesquisa Agropecuaria Brasileira, vol. 39, no. 1, Jan. 2004, pp. 47-53, doi:10.1590/S1678-3921.pab2004.v39.6735.