@article{Orysiak:2020,
  author  = "J. Orysiak and J. Fitzgerald and J. Malczewska-Lenczowska and K. Witek and J. Gajewski and A. Zembroń-Łacny and B. Morawin and D. Sitkowski",
  title   = "Vitamin D and upper respiratory tract infections in young active males exposed to cold environments",
  journal = "Annals of Agricultural and Environmental Medicine",
  volume  = "2020",
  pages   = "1--6",
  year    = "2020",
}