S. Saha, R. Begum, M. Z. Sultan, F. M. Amjad, M. S. Amran, and M. A. Hossain, “In vitro Interaction of Metformin with Diclofenac in Aqueous Medium”, Dhaka Univ. J. Pharm. Sci, vol. 11, no. 2, pp. 101–106, Apr. 2013.