Application of Two-Dimensional Nuclear Magnetic Resonance Spectroscopy to Quality Control of Ginseng Commercial Products - Yang, Shih Ying; Kim, Hye Kyong; Lefeber, Alfons W M; Erkelens, Cornelis; Angelova, Nadezhda; Choi, Young Hae; Verpoorte, Robert (Planta Medica, 2006)