KRISHNAKUMAR, M R SUDHARSHAN, S. S. V. “Effect of Different Methods of Planting and Spacing on Growth and Yield of Cardamom (Elettaria Cardamomum Maton)”. Journal of Spices and Aromatic Crops, vol. 7, no. 2, Dec. 1998, pp. 81-84, https://updatepublishing.com/journal/index.php/josac/article/view/4687.