Madhusoodanan, K M Kuruvilla, P. P. M. V. V. R. K. J. “Yield Forecasting in Cardamom (Elettaria Cardamomum Maton) Plantations under Intensive Management”. Journal of Spices and Aromatic Crops, vol. 12, no. 1, July 2003, pp. 55-56, https://updatepublishing.com/journal/index.php/josac/article/view/4744.