1. Charlesworth, B., 1985: Recombination, genome size and chromosome number. ? InCavalier-Smith, T., (Ed.): The evolution of genome size. ? New York: Wiley.
2. Jackson, R. C., 1957: New low chromosome number for plants. ? Science (N.Y.)126: 1115?1116.
3. Jones, K., 1978: Aspects of chromosome evolution in higher plants. ? Adv. Bot. Res.6: 120?194.
4. Levitsky, G. A., 1931: The karyotype in systematics. ? Bull. Appl. Bot. Genet. Pl. Breed.27: 220?240.
5. Marks, G. E., 1975: The giemsa staining centromeres ofNigella damascena. ? J. Cell. Sci.18: 19?25.