Jankowska, Paula, and Ewa Rudnicka-Drożak. “Physical Activity and Health Behaviors of Children from 4-6 Classes of Primary School Living in the Villages of the Lublin and Lodz Voivodeships”. Journal of Education, Health and Sport 8, no. 8 (August 9, 2018): 642–649. Accessed September 1, 2024. https://apcz.umk.pl/JEHS/article/view/5782.