Gorczyński, Marcin, Marek Napierała, Jerzy Eksterowicz, and Walery Zukow. 2018. “Physical Development of 10-Year Students from Basic School No. 10 in Torun”. Journal of Education, Health and Sport 8 (12):458-76. https://apcz.umk.pl/JEHS/article/view/6403.