LAWRENCE, G M NAIR, V. S. E. T. B. (1993) “Plant regeneration in Piper longum L. (Piperaceae) through direct and indirect adventitious shoot development”, Journal of Spices and Aromatic Crops, 2(1), pp. 34–40. Available at: https://www.updatepublishing.com/journal/index.php/josac/article/view/4311 (Accessed: 5 October 2025).