VENKATAPPA, D. R. R. “Adoption of Recommended Practices for Cultivation of Cardamom (Elettaria Cardamomum Maton) in the Hill Zone of Karnataka, India”. Journal of Spices and Aromatic Crops, vol. 7, no. 2, Dec. 1998, pp. 137-9, https://updatepublishing.com/journal/index.php/josac/article/view/4498.