Elbashir, Abdalla Ahmed, and Omnia mohamed Abdallah alfaki. “Utilization of 4-Chloro-7-Nittobenzo-2-Oxa-1, 3-Diazol (NBD-CL) As Chromogenic Reagent for Determination of Metformin Hydrochloride (MET) in Pharmaceutical Formulation”. Asian Journal of Pharmaceutical Research and Development 7, no. 1 (February 15, 2019): 19–23. Accessed May 3, 2024. https://ajprd.com/index.php/journal/article/view/455.