1. Comings, D. E.: The distribution of sister chromatids at mitosis in Chinese hamster cells. Chromosoma (Berl.) 39, 428?433 (1970)
2. Cuevas-Sosa, A.: Human chromosomology: segregation of chromatids in diploid cells in vitro. Nature (Lond.) 218, 1059?1061 (1968)
3. Eberle, H., Lark, K. E.: Chromosome segregation in Bacillus subtilis. J. molec. Biol. 22, 183?186 (1966)
4. Feinendegen, L. E.: Tritium-labeled molecules in biology and medicine. New York: Academic Press 1967
5. Geard, C. R.: Studies in chromosome structure and replication. M. Sc. Thesis, University of Tasmania, Hobart 1969