T. Chano, K. Matsumoto, M. Ishizawa, S. Morimoto, S. Hukuda, and H. Okabe, “Periosteal osteosarcoma and parosteal chondrosarcoma evaluated by double immunohistochemical staining: Report of 2 cases”, ActaO, vol. 65, no. 3, pp. 355–358, Jan. 1994.