1. Baker, W.K. (1958): Crossing-over in heterochromatin. Am. Nat. 92, 59–60
2. Becker, H.J. (1974): Mitotic recombination maps in D. melanogaster. Naturwissenschaften 61, 441–448
3. Burnham, C.R. (1966): Cytogenetics in plant improvement. In: Plant breeding, Symp. Iowa State University (ed. Frey, K.J.), pp. 139–187. Ames, Iowa: Iowa State University Press
4. Dyer, A.F. (1963): Allocyclic segments of chromosomes and the structural heterozygosity that they reveal. Chromosoma 13, 545–576
5. Eslick, R.F. (1971): Balanced male steriles and dominant preflowering selective genes for use in hybrid seed production. In: Barley genetics II. Proc. II Int. Barley Genetics Symp. Pullman 1969 (ed. Nilan, R.A.), pp. 292–297. Pullman (WA, USA): Washington State University Press