1. CIMMYT, 1968. Research bulletin no. 11. Results of the second International Spring Wheat Yield Nursery (ISWYN) 1965–66. CIMMYT, Mexico, D.F.
2. CIMMYT, 1989. Towards the 21st century: CIMMYTs strategy. CIMMYT, Mexico. D.F.
3. Braun H.-J., W.H. Pfeiffer & W.G. Pollmer, 1992. Environments for selecting widely adapted spring wheat. Crop Sci. 32: 1420–1427.
4. Burr E.J., 1968. Cluster sorting with mixed character types. I. Standardization of character values. Aust. Comp. J. 1: 97–99.
5. Burr E.J., 1970. Cluster sorting with mixed character types. II. Fusion strategies. Aust. Comp. J. 2: 98–103.