Urashima, Alfredo Seiiti. “Variation in Virulence in the Rice Blast Fungus <i>Magnaporthe grisea< i> In São Paulo State”. Pesquisa Agropecuaria Brasileira, vol. 37, no. 1, Jan. 2002, pp. 109-15, doi:10.1590/S1678-3921.pab2002.v37.6318.