6James A. Duke, Beta vulgaris L. Handbook of Energy Crops, unpub-lished, 1983.
7Kanner J,Harel S,Granit R. Betalains - a new class of dietary cat-ionized antioxidants[ J]. Agric Food Chem,2001,49:5178 -5185.
8Kapadia G J, Tokuda H, Konoshima T, et al. Chemoprevention oflung and skin cancer by Beta vulgaris( beet) root extract[ J]. CaneerLett, 1996,100 :211 -214.