Cąkała, M., A. Zajkowska, M. Kozioł, K. Podgórniak, K. Błaszczak, J. Skotnicka, and M. Witkowska. “The Overview of Available Vitamin and Supplement Products Used to Improve Immune System Function”. Quality in Sport, vol. 19, July 2024, p. 53221, doi:10.12775/QS.2024.19.53221.