M. R. Saha, S. Ara, A. S. Rahman, S. Rahman, M. I. Hossain, and N. M. Badhon, “Glycemic Control by Combination Therapy of Sitagliptin-Metformin Versus Metformin Alone”, Khwaja Yunus Ali Medical College Journal, vol. 11, no. 3, pp. 150–153, Oct. 2020.