D., S. R., M. G., K. SHIVKUMAR, and G. THANGAVEL. “DEVELOPMENT AND VALIDATION OF HPLC METHOD FOR SIMULTANEOUS QUANTIFICATION OF VASICINE, GLYCYRRHIZIN AND PIPERINE IN POLY HERBAL COUGH SYRUP”. International Journal of Current Pharmaceutical Research, vol. 12, no. 2, Mar. 2020, pp. 15-19, doi:10.22159/ijcpr.2020v12i2.37480.