Qualitative screening of phenolic compounds in olive leaf extracts by hyphenated liquid chromatography and preliminary evaluation of cytotoxic activity against human breast cancer cells - Fu, S; Arráez-Roman, D; Segura-Carretero, A; Menéndez, J A; Menéndez-Gutiérrez, M P; Micol, V; Fernández-Gutiérrez, A (Anal Bioanal Chem, 2010)