Haydarova, F., K. Akshay, N. Yangieva, N. Abasxanova, and B. Sultonov. “Diabetic Retinopathy : Prevalence and Risk Factors of Its Development”. in Library, vol. 3, no. 3, Sept. 2002, pp. 31-34, https://www.inlibrary.uz/index.php/archive/article/view/14385.