Gebuhr, Peter, et al. “Heterotopic Ossification After Hip arthroplasty:A Randomized Double-Blind Multicenter Study of Tenoxicam in 147 Hips”. Acta Orthopaedica, vol. 67, no. 1, Jan. 1996, pp. 29-32, doi:10.3109/17453679608995604.