Wąs, S., and Z. Siedlecki. “Injuries Related to Taekwondo Training - Short Report Based on Experiences from Primary School No. 31 With Sports Championship Classes in Bydgoszcz (Poland)”. Journal of Education, Health and Sport, vol. 12, no. 7, May 2022, pp. 99-104, doi:10.12775/JEHS.2022.12.07.010.