“ABSORPTION CORRECTED METHOD & ISOABSORPTIVE POINT METHOD FOR SIMULTANEOUS ESTIMATION OF METOPROLOL AND AMLODIPINE IN THEIR COMBINED DOSAGE FORM”. International Journal of Pharmaceutical Sciences and Drug Research, vol. 4, no. 3, Oct. 2012, pp. 240-4, https://doi.org/10.25004/IJPSDR.2012.040404.