A. J. Vyas, J. K. Patel, J. V. Chavda, and B. A, “‘A New RP-HPLC Method for the Simultaneous Determination of Drotaverine Hydrochloride and Paracetamol in a Tablet Dosage Form’”, Scopus Indexed, vol. 4, no. 4, pp. 1544–1549, Feb. 2012.