R. KALAICHELV, M. F. ROSE, K. VADIVEL, and E. JAYACHANDRAN, “SIMPLE EXTRACTIVE COLORIMETRIC DETERMINATION OF PANTOPRAZOLE SODIUM BY ACID­DYE COMPLEXATION METHOD IN SOLID DOSAGE FORM”, Int J Chem Res, vol. 1, no. 1, pp. 6–8, Jan. 2010.