NAIR, K. R. P. N. C. “Induced Tetraploids of Ginger (Zingiber Officinale Rosc.)”. Journal of Spices and Aromatic Crops, vol. 1, no. 1, June 1992, pp. 39-42, https://updatepublishing.com/journal/index.php/josac/article/view/4279.