1. Bowman WC, Rand MJ, West GB (1974) Textbook of pharmacology, sixth printing. Blackwell, Oxford, p 651
2. Löfgren N, Lundqvist B (1946) Svensk Kem Tid 58:206; Chem Abstr (1949) 43:1022d
3. Gaind JKN, Migliani BD, Gupta KC (1962) J Pharmacol 24:254; Chem Abstr (1963) 58:11321f
4. Jindal DP, Coumar MS, Singh B, Ismail MMM, Zambare GN, Bodhankar SL (2003) Arzneim Forsch 53:34
5. Grewal MS, Gurdev S (1963) Indian J Physiol Pharmacol 7:245; Chem Abstr (1964) 61:13759c