1. K. Yu. Akhmedov, External Respiration and Its Regulation during High-Altitude Hypoxia. Doctoral Dissertation, Moscow-Dushanbe (1967).
2. V. D. Glebovskii and V. A. Zhdanov, Fiziol. Zh. SSSR, No. 9, 1118 (1969).
3. S. I. Frankshtein, Fiziol. Zh. SSSR, No. 8, 1191 (1970).
4. L. L. Shik, A. M. Kulik, and M. G. Shneiderovich, in: Oxygen Therapy and Oxygen Insufficiency, [in Russian], Kiev (1952), p. 53.
5. S. I. Frankstein, in: Breathing: Hering-Breuer Centenary Symposium, London (1970), p. 53.