• Analysis of the stable free radical scavenging capability of artificial polyphenol mixtures and plant extracts by capillary electrophoresis and liquid chromatography-diode array detection-tandem mass spectrometryHelmja, Kati; Vaher, Merike; Püssa, Tõnu; Kaljurand, MihkelJournal of chromatography A2009 / p. 2417-2423 : ill