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2. N. A. Voloshin and A. G. Yakhnitsa, Abstracts of Proceedings of the Third Conqress of Endocrinologists of the Ukrainian SSR [in Russian], Vinnitsa (1983), pp. 24?25.
3. N. A. Zharikova and A. A. Chevlytko, Current Problems in Theoretical and Clinical Medicine [in Russian], Minsk (1973), pp. 112?119.
4. V. A. Malyzhev, ?The lymphocyte-stimulating substance of the thymus (LSS) and its role in the formation of immunocompetent T lymphocytes,? Author's Abstract of M. D. Dissertation, Kiev (1982).
5. D. Miller and P. Dukor, Biology of the Thymus [Russian translation], Moscow (1967).