1. L. O. Randall,Dis. Nerv. Syst. 1961,22 [Suppl. II], 4.
2. W. O. Foye,Principles of Medicinal Chemistry, Lea and Febiger, Philadelphia, 1981.
3. H. Sch�tz,Benzodiazepines, Vol. I, Springer, Berlin Heidelberg New York, 1982.
4. H. Sch�tz,Benzodiazepines, Vol. II, Springer, Berlin Heidelberg New York Tokyo, 1989.
5. British Pharmacopoeia, H. M. Stationery Office, London, 1988.