“Simultaneous estimation of Cetirizine hydrochloride, Phenylpropanolamine hydrochloride and Paracetamol by RP-HPLC method”, IJPLS, vol. 4, no. 11, pp. 3122–3132, Nov. 2013, Accessed: Dec. 15, 2025. [Online]. Available: http://ijplsjournal.com/index.php/ijpls/article/view/579