Prabhu, Anne Sitarama, et al. “Leaf and Grain Infection of Rice by Helminthosporium Oryzae and Their Effect on Yield Components”. Pesquisa Agropecuaria Brasileira, vol. 15, no. 2, Apr. 2014, pp. 183-9, doi:10.1590/S1678-3921.pab1980.v15.16522.