Edvardsen, Per, John Slørdahl, and Svein Svenningsen. “Operative Versus Conservative Treatment of Calvé-Legg-Perthes Disease”. Acta Orthopaedica 52, no. 5 (January 1, 1981): 553–559. Accessed May 14, 2026. https://actaorthop.org/actao/article/view/28885.