Soliev B.S., Khuzhaniyazova N.K. , M. K. , K. A. , T. F. “Importance of Vitamin D For Children”. American Journal of Pediatric Medicine and Health Sciences (2993-2149), vol. 2, no. 4, Apr. 2024, pp. 74-77, https://grnjournal.us/index.php/AJPMHS/article/view/4262.