Zufarova Nodira Ibroxim qizi. “Characteristics of The Health of Children With Down Syndrome, Taking into Account Vitamin D and Trace Element Status, Development of Methodological Approaches to Correction”. Emerging Frontiers Library for The American Journal of Medical Sciences and Pharmaceutical Research, vol. 8, no. 2, Feb. 2026, pp. 153-6, https://emergingsociety.org/index.php/efltajmspr/article/view/1011.