1.
KACZMARCZYK, Dariusz, ZAGACKI, Dawid and MORAWIEC-SZTANDERA, Alina. Upper respiratory tract infection in children – immunostimulating treatment. Journal of Education, Health and Sport. Online. 6 September 2021. Vol. 11, no. 9, pp. 80-89. [Accessed 13 May 2026]. DOI 10.12775/JEHS.2021.11.09.011.