1. Baker, H G. 1970. Genetic resources in plants: their exploration and conservation. In Frankel O. H. and Bennett E. (eds.) Taxonomy and the biological species concept in cultivated plants. Blackwell Scientific Publications, Oxford, pp. 49–68.
2. Ball, P W. 1968. Flora Europae 2, Edited by T. G. Tutin et al. Cambridge University Press, London, 128–136.
3. Bennett, M D. 1982. Nucleotypic basis of spatial ordering of chromosomes in eukaryotes and the implications of the order for genome evolution and phenotypic variation. Genome Evolution. Academic Press, London, pp. 239–261.
4. Bennett, M D, and Smith, J B. 1976. Nuclear DNA amounts in angiosperms. Phil Trans Roy Soc B, 274, 227–274.
5. Brandham, P E. 1983. Proceedings of the Kew Chromosome Conference 11, Allen and Unwin.