1.
ZIELIŃSKI, Grzegorz, GINSZT, Michał, FILIPIAK, Zuzanna, SUWAŁA, Marta and MAJCHER, Piotr. Vitamin D deficiency and tension-type headaches in children - literature review. Journal of Education, Health and Sport. Online. 24 March 2019. Vol. 9, no. 3, pp. 455-464. [Accessed 16 September 2024].