1. A. V. Azaryan,Peptide Hydrolases in Nervous System and Their Biochemical Functions [in Russian], Erevan (1989), p. 207.
2. L. V. Kalyuzhnyii, M. A. Gruden', S. V. Litvinova,et al., Byull. Eksp. Biol. Med.,116, No. 7, 6–9 (1993).
3. S. V. Litvinova, A. Yu. Kozlov, and L. V. Kalyuzhnyii,—Ibid.,,116, No. 7, 54–56 (1993).
4. S. V. Litvinova, V. V. Shulgovskii, L. F. Panchenko,et al., Vopr. Narkol.,4, 49–53 (1997).
5. S. de la Baume, C. Gros, C. Yi,et al., Life Sci.,31, No. 16-17, 1753–1756 (1982).