Antioxidant potential of crocins and ethanol extracts of gardenia jasminoides ELLIS and crocus sativus L.: A relationship investigation between antioxidant activity and crocin contents - Chen, Y; Zhang, H; Tian, X; Zhao, C; Cai, L; Liu, Y; Jia, L; Yin, H X; Chen, C (Food Chem, 2008)