GUNASEKARAN, S., and E. SAILATHA. “Estimation of Pyrazinamide, Isoniazid and Rifampicin in Pharmaceutical Formulations by High Performance Liquid Chromatography Method”. Asian Journal of Chemistry, vol. 21, no. 5, Mar. 2010, pp. 3561-6, https://asianpubs.org/index.php/ajchem/article/view/17332.