1. Yu. I. Ivanov and B. A. Pakhmurnyi, Byull. Éksperim. Biol. i Med., No. 4, 123 (1965).
2. D. Sepetliev, Statistical Methods in Scientific Medical Research [in Russian], Moscow (1968).
3. V. Yu. Urbakh, Statistics for Biologists and Medical Scientists [in Russian], Moscow (1963).
4. D. M. Bachman and W. B. Youmans, Circulation,7, 413 (1953).
5. F. C. Bartter, Ann. New York Acad. Sci.,110, 682 (1963).