A. N. Chalazonitis, A. C. Tilentzoglou, N. Condilis, J. Tzovara, P. Porfyridis, and N. Ptohis, “Osteoid osteoma of the patella Case report and review of the literature”, Ann Ital Chir, vol. 77, no. 6, pp. 533–536, Nov. 2006.