1. Allard, R. W., 1956. Formulas and tables to facilitate the calculation of recombination values in heredity. Hilgardia 24: 235–277.
2. Dyck, P. L., D. J., Samborski & R. G., Anderson, 1966. Inheritance of adult plant leaf rust resistance derived from the common wheat varieties Exchange and Frontana. Can. J. Genet. Cytol. 8: 665–671.
3. Hare, R. A. & R. A., McIntosh, 1979: Genetic and cytogenetic studies of durable adult-plant resistance in ‘Hope’ and related cultivars to wheat rusts. Z. Pflanzenzuchtg 83: 350–367.
4. Hawthorn, W., 1981. Lr13—a widely-occuring gene for leaf rust resistance in wheat. Abstr. XIII Int. Bot. Cong., Sydney, Australia, 274.
5. Johnston, C. O. & M. N. Levine, 1955. Fifth revison of the international register of physiologic races of Puccinia rubigovera (DC.) Wint. f.sp. tritici (Eriks) Carleton. The Plant Disease Reporter, Agric. Res. Service, U.S. Dept. Agric., Supplement 233.