Johnson K George, N K Leela, P A Mathew, P Utpala, G R Asish, K V Saji,. “Diversity Study of Leaf Volatile Oil Constituent of Piper Species Based on GC/ MS and Spatial Distribution”. Journal of Spices and Aromatic Crops 23, no. 1 (June 24, 2014): 10–16. Accessed September 24, 2025. https://www.updatepublishing.com/journal/index.php/josac/article/view/5077.