1. P. K. Klimov, Peptides and The Digestive System [in Russian], Leningrad (1983).
2. A. N. Kurzanov, Yu. Yu. Khaimov, and V. A. Aleinik, Neuropeptides: Their Role in Physiology and Pathology [in Russian], Tomsk (1985), pp. 88?89.
3. M. T. Lutsenko, Leningrad Military Medical Academy: Conference to Commemorate the Centenary of the Histology Department [in Russian], Leningrad (1968), pp. 140?141.
4. N. K. Permyakov, G. P. Titova, V. A. Penin, et al., Neuropeptides: Their Role in Physiology and Pathology [in Russian], Tomsk (1985), pp. 104?105.
5. D. S. Sarkisov, Regeneration and Its Clinical Importance [in Russian], Moscow (1970).