The Ferric Reducing Ability of Plasma (FRAP) as a Measure of “Antioxidant Power”: The FRAP Assay
http://www.sciencedirect.com/science/article/pii/S0003269796902924

Use of a free radical method to evaluate antioxidant activity
http://www.sciencedirect.com/science/article/pii/S0023643895800085

Chromatographic determination of carotenoids in foods
http://www.sciencedirect.com/science/article/pii/S0021967300003290

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