1. S.J. Chüdress and M.I. Gluckman: J. Phann. Sci. 55, 577 (1964).
2. L.H. Stembach, L.O. Randall, S. Gustafson, in: Psychophannacological Agents, vol. 1, p. 137. Ed. M. Gordon. Academic Press, New York 1964.
3. LH. Stembach, LO. Randall: CNS Drags, Symposium Regional Res. Laboratory, Hyderabad, India, p. 53. Council of Scientific and Industrial Res., New Delhi, India, 1966
4. J.A. Moore. Mitchell, in: Heterocyclic Compounds, vol.9, p.224. Ed. R.C. Elderfield. John Wüey & Sons, Inc., New York 1967.
5. L.H. Stembach, L.O. Randall, R. Banziger, H. Lehr, in: Medicinal Research Series, vol. 2, p. 237. Ed. A. Burger. Marcel Dekker, Inc., New York 1968.