R. Maheshwari, M. Kinariwala, M. Saxena, M. Gahlot, R. Chaki, and Y. Jagwani, “Spectrophotometric Analysis of Cefixime Trihydrate Tablets Using Metformin Hydrochloride as Hydrotropic Solubilizing Agent”, ajc, vol. 20, no. 8, pp. 6047–6050, Mar. 2010.