Mrozkowiak, Mirosław. “The Influence of the Angle of the Trunk Flexion and Extension in the Sagittal Plane and Flexion in the Frontal Plane on the Value of Features Describing the Spine and Pelvis Among 7 to 15-Year-Old Youth of Both Sexes”. Journal of Education, Health and Sport 45, no. 1 (August 24, 2023): 35–56. Accessed April 14, 2024. https://apcz.umk.pl/JEHS/article/view/39411.