1. Brown AHD (1989a) The case for core collections. In: Brown AHD, Frankel DH, Marshall DR, Williams JT (eds) The use of plant genetic resources. Cambridge University Press, Cambridge, pp 136–156
2. Brown AHD (1989b) Core collections: A practical approach to genetic resources management. Genome 31:818–824
3. Chapman CGD (1984) On the size of a genebank and the genetic variation it contains. In: Holden JHW, Williams JT (eds) Crop genetic resources: conservation and evaluation. Allen and Unwin, London, pp 102–108
4. Crossa J (1989) Methodologies for estimating the sample size reequired for genetic conservation of outbreeding crops. Theor Appl Genet 77:153–161
5. Frankel OH, Brown AHD (1984) Plant genetic resources today: a critical appraisal. In: Holden JHW, Williams JT (eds) Crop genetic resources: conservation and evaluation. Allen and Unwin, London, pp 149–257