Machaj, Dominik, Katarzyna Cyboran, Alicja Płaczek, Marlena Baran, and Michał Wojnowski. 2020. “The Importance of Vitamin D3 Supplementation in Orthopedics - Literature Review”. Journal of Education, Health and Sport 10 (5):118-22. https://doi.org/10.12775/JEHS.2020.10.05.011.