Syed Nizamuddin, Nagaraj .N Durgadasheemi, and R. Raveendra, “Absorption Ratio and First Derivative Method Estimation of Paracetamol and Flupirtine Maleate in Bulk and Pharmaceutical Dosage form”, IJMS, vol. 6, no. Spl Issue 7, pp. 126–133, Jun. 2019.