1. Duran, R. (1969) Incompatibility in Sorosporium consanguineum from western United States. Phytopathology 59: 1638–1640.
2. Duran, R. (1971) Evidence of multiple allelomorphy at the incompatibility locus in Sorosporium consanguineum. Mycopath. Mycol. appl. 44: 89–94.
3. Eddins, A. H. (1929) Pathogenicity of multisporidial and monosporidial cultures of Ustilago zeae (Beckm.) Ung. Phytopathology 19: 91.
4. Flor, H. H. (1931) Indications of heterothallism in Tilletia tritici. Phytopathology 21: 107.
5. Flor, H. H. (1932) Heterothallism and hybridization in Tilletia tritici and T. levis. J. Agr. Res. 44: 49–58.