Mrozkowiak, Mirosław. “The Evaluation of the Impact of Flexion and Extension Angles and Lateral Torso Flexion on the Selected Spine and Pelvis Parameters”. Pedagogy and Psychology of Sport 7, no. 2 (March 20, 2021): 51–65. Accessed April 20, 2024. https://apcz.umk.pl/PPS/article/view/PPS.2021.07.02.004.