Felmet, Gemot, Ugo de Nicola, and Hans-Werner Springorum. “Failure of Metal-Backed Uncemented Patellar Components: Report on 3 Cases”. Acta Orthopaedica 60, no. 6 (January 1, 1989): 715–717. Accessed May 17, 2026. https://actaorthop.org/actao/article/view/22701.