Stallmann, Hein P, Chris Faber, Herbert M Plokker, and Paul I J M Wuisman. “Biodegradable X-Ray Markers of Controlled Radio-Opacity”. Acta Orthopaedica 76, no. 1 (January 1, 2005): 122–127. Accessed May 4, 2026. https://actaorthop.org/actao/article/view/19306.