1. Britten, R. J., Graham, D. E., Neufeld, B. R., 1974: Analysis of repeating sequences by reassociation kinetics. In: Grossman, L., Moldave, K. (eds.). Methods in Enzymology, Vol. 29, pp. 363–405, New York: Academic Press.
2. Brown, P. C., Tlsty, T. D., Schimke, R. T., 1983: Enhancement of methotrexate resistance and dihydrofolate reductase gene amplification by treatment of mouse 3T6 cells with hydroxyurea. Mol. Cell Biol. 3, 1097–1107.
3. Cullis, C. A., 1975: Environmentally induced DNA differences in flax. In: Markham, R., Davies, D. R., Hopwood, D. A., and Home, R. W. (eds.): Modification ot the Information Content of Plant Cells, pp. 27–36. Amsterdam: North Holland.
4. Cullis, C. A., 1976: Environmentally induced changes in ribosomal RNA cistron number in flax. Heredity 36, 73–79.
5. Cullis, C. A., 1977: Molecular aspects of the environmental induction of heritable changes in flax. Heredity 38, 129–154.