1. A. G. Bukhtiyarov, Intra-Arterial and Interavenous Injection of Certain Chemical Excitants (Experimental Investigation), Leningrad, 1949. In Russian.
2. I. P. Kokorev, cited by V. S. Galkin “Experiment in the Application of the Conditioned Reflex Method in Everyday Pathophysiological Practice”, Mochanisms of Pathological Resctions, Medgiz, 1955. In Russian.
3. L. V. Krushirski, Uspekhi Sovremennol Biol. Vol. 1 (4) pp. 108–133.
4. O. S. Merkulova and M. Y. Ratner, Byull. Eisptl. Biol. i Med., 1955, Vol. 39, No. 5, pp. 45–50.
5. I. P. Pavlov. in the book: Paviovian Media, Leningrad, 1949, Vol. 3, pp. 402–405. In Russian.