6Eiichi K, Molina B, Yoichiro Ito. Separation of rare earth elements by high-speed counter-current chromatography.J Chromatogr, 1991, 538(199): 133 -. 140.
7Degenhardt A, Engelhardt UH, et al. Isolation of black tea pigment using high-speed countercurrent chromatography and studies on properties of black tea pigmen. J Agric Food Chem,2000,48(11): 5200 -5205.
8Degenhardt A, Knapp H, et al. Preparative isolation of anthocyanins by high-speed countetercurrent chromatography and screening for abtioxidant activity. J Agric Food Chem,2000,48(2): 338- 343.
9Degenhardt A, Hofmann S, et al. Preparative isolation of an thocyanins by high-speed countercurrent chromatography and pplication of the color activity concept to red wine. J Agric Food Chem, 2000 , 48 (12): 5812 - 5818.
10Oka F, Oka H, Ito Y. J Chromatogr, 1991, 538:99 - 108.