Saeb Aboud Hassan, Emad Hamdi Jassim. “EFFECT OF L-PHENYLALANINE ON THE PRODUCTION OF SOME ALKALOIDS AND STEROIDAL SAPONINS OF FENUGREEK COTYLEDONS DERIVED CALLUS”. Pakistan Journal of Biotechnology, vol. 15, no. 2, June 2018, pp. 481-6, https://pjbt.org/index.php/pjbt/article/view/420.