Dan, S., K. Malik, J., Singh, N., Bharati, D., & Bose, A. (2011). Development and Optimization of Fixed Dose Antihypertensive Combination Drugs using Double Layer Sustained Release Microsphere Technology. Asian Journal of Chemistry, 23(9), 3883–3886. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/10751