SASIKUMAR, P N RAVINDRAN, B. “Variability in Open Pollinated Seedlings of Black Pepper (Piper Nigrum L.)”. Journal of Spices and Aromatic Crops 2, no. 1 (December 22, 1993): 60–65. Accessed June 24, 2026. https://www.updatepublishing.com/journal/index.php/josac/article/view/4445.