1. L. H. Allikmets, A. M. Zharkovskii, A. M. Nurk, et al., Vestn. Akad. Med. Nauk SSSR, No 11, 37 (1984).
2. A. M. Nurk, M. O. Maimets, L. K. Rägo, and Ö. Ö. Vasar, in: The Mechanism of Action and Clinical Use of Gamma-Aminobutyric Acid Derivatives [in Russian], Tartu (1984), pp. 71?78.
3. J. A. Childs and K. Gale, Life Sci.,33, 1007 (1983).
4. D. M. Coward, Psychopharmacology,76, 294 (1982).
5. S. E. File, R. C. Lister, and D. J. Nutt, Neurosci. Lett.,32, 165 (1982).