Dorn, Ulrich, Claude Grethen, Harald Effenberger, Hans Berka, Thomas Ramsauer, and Thomas Drekonja. “Indomethacin for Prevention of Heterotopic Ossification After Hip Arthroplasty: A Randomized Comparison Between 4 and 8 Days of Treatment”. Acta Orthopaedica 69, no. 2 (January 1, 1998): 107–110. Accessed May 15, 2026. https://actaorthop.org/actao/article/view/20537.