Akhter, M., Z. Zeba, M. Mia, S. Akter, R. Zinnat, and L. Ali. “Glucose Dependent Insulinotropic Polypeptide in Impaired Glucose Tolerance and Its Association With Insulin Secretion and Sensitivity”. Romanian Journal of Diabetes Nutrition and Metabolic Diseases, Vol. 27, no. 4, Dec. 2020, pp. 336-41, https://www.rjdnmd.org/index.php/RJDNMD/article/view/769.