S Mohan, A K Valsa, D. V. K. D. R. M. “Antibacterial Activity of Piper Nigrum, Coriandrum Sativum, Trigonella Foenum-Graecum and Ferula Narthex”. Journal of Spices and Aromatic Crops, vol. 12, no. 1, June 2003, pp. 86-88, https://updatepublishing.com/journal/index.php/josac/article/view/4758.