SERGIO ZAPATA, JEAN-PIERRE DUFOUR. Ascorbic, Dehydroascorbic and Isoascorbic Acid Simultaneous Determinations by Reverse Phase Ion Interaction HPLC. Journal of Food Science, 1992, 57, 506-511.
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http://dx.doi.org/10.1111/j.1365-2621.1992.tb05527.xHiroshi Iwase, Ichiro Ono. Determination of ascorbic acid and dehydroascorbic acid in juices by high-performance liquid chromatography with electrochemical detection using l-cysteine as precolumn reluctant. Journal of Chromatography A, 1993, 654, 2, 215-220.
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http://dx.doi.org/doi:10.1016/0021-9673(93)83364-X