1. Concise International chemical Assessment Document 49, World Health Organisation, Geneva 2003
2. Mertchenk B, Beck F, Bauer W (1995) Ullmann’s encyclopedia of Industrial Chemistry, Weinhelm, VCH, 5th edition, A26:803–815
3. Pasteris RJ (1986) Eur Pat Appl EP 166:516
4. Bajji AC, Channabasavaraj KP, Swamy KMK (1994) Indian Drugs 31(6):269
5. Desai PS, Desai KR (1993) J Indian Chem Soc 70:177