SHANYHIN, Anton, BABIENKO, Volodymyr, STRAKHOV, Yevhen and KORKHOVA, Arina. Mathematical modeling of the dependence of the risk of vitamin D deficiency on anthropometric and laboratory parameters. Journal of Education, Health and Sport. Online. 28 April 2023. Vol. 13, no. 4, pp. 356-366. [Accessed 5 July 2025]. DOI 10.12775/JEHS.2023.13.04.042.