A. Rajasekaran, R. Kavitha and R. Arivukkarasu (2014) “Development and validation of HPTLC method for simultaneous estimation and stability indicating study of metformin HCl and linagliptin in pharmaceutical formulation”, World Journal of Pharmaceutical Sciences, 2(4), pp. 317–327. Available at: https://wjpsonline.com/index.php/wjps/article/view/hptlc-method-metformin-linagliptin-estimation (Accessed: 12 December 2025).