1. O. P. Vishnevskaya, Byull. Eksptl. Biol. i Med. 38, No. 10, 29?32 (1954).
2. M. G. Durmishyan, Disease, Treatment, and Recovery (In Russian) (Moscow, 1952) pp 415?462.
3. B. I. Lavrentyev, Morphology of Sensory Innervation of the Viscera (In Russian) (Moscow, 1948).
4. E. K. Plechkova, ibid. Morphology of Sensory Innervation of the Viscera (In Russian) (Moscow, 1948), pp. 46?69.
5. A. E. Smirnov, Nevrol. Vestnik, 9, No. 1, 135?140 (1901).