ROCZNIAK, Katarzyna, BABUŚKA–ROCZNIAK, Magdalena, WOJTANOWSKA–KACZKA, Magdalena, RACZ, Oliver, ROCZNIAK, Anna, LYUBINETS, Oleh, WIDUCHOWSKI, Wojciech and ROCZNIAK, Wojciech. Morphological and motor skills condition among 10-11 year old children engaged in cross-country skiing attending Sports Primary School in Suprasl. Journal of Education, Health and Sport. Online. 8 June 2020. Vol. 10, no. 6, pp. 68-81. [Accessed 3 February 2025]. DOI 10.12775/JEHS.2020.10.06.007.