Madureira Brasil, E. and de Carvalho, Y. (1998) “Maize hybrids performance in relation to Phaeosphaeria maydis in different sowing times”, Pesquisa Agropecuaria Brasileira, 33(12), pp. 1977–1981. doi:10.1590/S1678-3921.pab1998.v33.5024.