1. Bochkov, N. P., Lopukhin, Y. M., Kuleshov, N. P., Kovalchuk, L. V.: Cytogenetic study of patients with ataxia-telangiectasia. Humangenetik 24, 115?128 (1974)
2. Chaganti, R. S. K., Schonberg, S., German, J.: A manyfold increase in sister chromatid exchanges in Bloom's syndrome lymphocytes. Proc. nat. Acad. Sci. (Wash.) 71, 4508?4512 (1974)
3. Goodman, W. N., Cooper, W. C., Kessler, G. B., Fischer, M. S., Gardner, M. B.: Ataxia-telangiectasia: a report of two cases in siblings presenting a picture of progressive spinal muscular atrophy. Bull. Los Angeles neurol. Soc. 34, 1?22 (1969)
4. Harnden, D. G.: Ataxia telangiectasia syndrome: Cytogenetic and cancer aspects. Chromosomes and cancer (ed. J. German), pp. 619?636. New York: Wiley 1974
5. Hayashi, K., Schmid, W.: The rate of sister chromatid exchanges parallel to spontaneous chromosome breakage in Fanconi's anemia and to Trenimon-induced aberrations in human lymphocytes and fibroblasts. Humangenetik (in press)