1. M. A. Aliev, Abstracts of Proceedings of the Second Conference of Physiologists, Biochemists, and Pharmacologists of Central Asia and Kazakhstan [in Russian], Frunze (1960), p. 29.
2. I. G. Antonova, Importance of afferent impulses for the periodic activity of the respiratory center, author's abstract of candidate dissertation, Leningrad (1953).
3. I. I. Veprintsev, in the book: Advances in the Physiology and Pathology of Respiration [in Russian], Moscow (1961), p. 37.
4. V. Ya. Danilevskii, Vrach, 7, 853 (1886).
5. Z. N. Ivanova, in the book: Investigations into the Pharmacology of the Reticular Formation and Synaptic Transmission [in Russian], Leningrad (1961), p. 193.