1. K. N. Fedorova and D. M. Spitkovskii, Byull. Éksp. Biol. Med., No. 6, 672 (1976).
2. K. N. Fedorova et al., Humangenetik,28, 183 (1975).
3. P. Fialkow, Ann. New York Acad. Sci.,171, 500 (1971).
4. I. Grozdea, P. Colombies, and I. Verdiev, Nouv. Presse Med.,2, 1289 (1973).
5. L. Hsu and M. Gertner, Am. J. Human Genet.,23, 592 (1971).