Grad, Rafał, and Kazimierz Kochanowicz. “The Quality of Landing in the Gymnastic Exercises, As Seen by Coaches in Acrobatic Gymnastics and Tumbling”. Journal of Education, Health and Sport 7, no. 6 (June 9, 2017): 190–200. Accessed June 29, 2025. https://apcz.umk.pl/JEHS/article/view/4520.