Panicker R Pournami, Joseph Ancy, B Thayumanavan,. 2012. “Characterization of Polyphenol Oxidase in Ginger (Zingiber Officinale R.)”. Journal of Spices and Aromatic Crops 21 (1):33-41. https://updatepublishing.com/journal/index.php/josac/article/view/5007.