Prasad, N. B., A. R. Sekhar, K. Meena, and T. J. Chandra. “Correlation Between Serum Magnesium Levels and Diabetic Retinopathy in Type 2 Diabetes Mellitus”. International Journal of Advances in Medicine, vol. 6, no. 6, Nov. 2019, pp. 1859-62, doi:10.18203/2349-3933.ijam20195241.