Quantitation of oleuropein and related metabolites in decoctions of Olea europaea leaves from ten Greek cultivated varieties by HPLC with diode array detection (HPLC-DAD) - Agalias, A; Melliou, E; Magiatis, P; Mitaku, S; Gikas, E; Tsarbopoulos, A (J Liq Chromatogr Relat Technol, 2005)