[1]
Hamed M. El-Fatatry, Mokhtar M. Mabrouk, Sherin F. Hammad, and Samah F. El-Malla, “Simultaneous determination of tapentadol HCl and paracetamol by ratio-spectra derivative spectrophotometry”, World J Pharm Sci, vol. 3, no. 7, pp. 1290–1297, Jul. 2015.