1. N. N. Bogolepov, Electron Microscope Techniques of Brain Research [in Russian], Meditsina, Moscow (1976).
2. A. A. Borovkov, Mathematical Statistics (further chapters) [in Russian], Nauka, Moscow (1984).
3. D. A. Vasilenko and P. G. Kostyuk, Intersegmental Neuronal Systems of the Spinal Cord [in Russian], Naukova Dumka, Kiev (1983).
4. L. N. D'yachkova, P. G. Kostyuk, and N. Kh. Pogorelaya, "Neuronal organization of the lateral basilar area of the cat spinal cord," Neirofiziologiya,4, No. 4, 296?302 (1972).
5. P. G. Kostyuk, V. A. Maiskii, and L. A. Savos'kina, "Synaptic connections between propriospinal neurons belonging to the lumbar region of the cat spinal cord," Neirofiziologiya,3, No. 4, 401?407 (1971).