Souza, G., N. Rajeswari, and H. Ramesh Babu. “Influence of Rootstock Scion Combinations on Morpho-Physiological Traits in Coffee”. Journal of Plantation Crops, vol. 39, no. 3, Nov. 2011, pp. 351-7, https://updatepublishing.com/journal/index.php/JPC/article/view/5916.