YADUKUMAR, RAJENDRA HEGDE, M M HOSMANI, V. S. K. S. J. A. N. “Microclimatic and Physiological Analysis in Coffee-Cardamom Mixed Cropping System”. Journal of Spices and Aromatic Crops, vol. 7, no. 2, Dec. 1998, pp. 133-5, https://updatepublishing.com/journal/index.php/josac/article/view/4496.