Jasim, D., M. Abdul-Nabi, and A. Fadil. “The Correlation Between Vitamin D Deficiency With Tear Film Break-up Time in Patients With Dry Eye Syndrome”. Romanian Journal of Diabetes Nutrition and Metabolic Diseases, Vol. 30, no. 4, Dec. 2023, pp. 414-23, https://rjdnmd.org/index.php/RJDNMD/article/view/1394.