Metabolomic Strategy for the Classification and Quality Control of Phytomedicine: A Case Study of Chamomile Flower (Matricaria recutita L.) - Wang, Yulan; Tang, Huiru; Nicholson, Jeremy K; Hylands, Peter J; Sampson, Julia; Whitcombe, Ian; Stewart, Christopher G; Caiger, Steve; Oru, Isaac; Holmes, Elaine (Planta Medica, 2004)