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Theppakorn T., . and Luthfivyyah A., . and Ploysri K., . Simultaneous determination of caffeine and 8 catechins in oolong teas produced in Thailand. pp. 2055-2061. ISSN 22317546
Theppakorn T., . Stability and chemical changes of phenolic compounds during Oolong tea processing. pp. 564-574. ISSN 2231-7546