1. The United States Pharmacopoeia, 21st revision, NF 16th ed. Official Monograph for USP XXI, 1528, (1985).
2. USFDA GRAS, 83 (1977) and Chapter 184,1330, (1987).
3. JECFA - FAO Food and Nutrition Paper, Rome, No.34, (1986).
4. JECFA - FAO Food and Nutrition Paper, Rome, No.49, (1990).
5. J.H. Ross, A Conspectus of the African Acacia Species in Memoirs of the Botanical Survey of South Africa, D.J.B. Killick ed., Republic of South Africa, 1–151, (1979).