Kuźniewska, E., M. Napierała, M. Pezala, and R. Gotowski. “State Somatic and Motor Skills Children With Kindergarten Public Cekcyn”. Journal of Education, Health and Sport, vol. 6, no. 10, Oct. 2016, pp. 861-85, https://apcz.umk.pl/JEHS/article/view/4255.