Wagner, Philippe, and Gunnar Hägglund. “Development of Hip Displacement in Cerebral Palsy: A Longitudinal Register Study of 1,045 Children”. Acta Orthopaedica 93 (January 3, 2022): 124–131. Accessed August 30, 2026. https://scandjms.sfulib10.publicknowledgeproject.org/index.php/actao/article/view/851.