1) Dahlin DC and Beabout JW : Dedifferentiation of low-graede chondrosarcoma. Cancer 28 : 461-466, 1971.
2) Unni KK, Dahlin DC, McLeod RA and Pritchard DJ : Intra-osseous well-differentiated osteosarcoma. Cancer 40 : 1337-1347, 1977.
3) Wold LE, Unni KK, Beabout JW, Sim FH and Dahlin DC : Dedifferentiated parosteal osteosarcoma. J Bone Joint Surg (Am) 66 : 53-59, 1984.
4】Meis JM, Raymond AK, Evans HL, Charles RE and Giraldo AA : “Dedifferentiated”chordoma : A clinicopathological and immunohistochemical study of three cases. Am J Surg Pathol 11 : 516-525, 1987.
5) Meis JM, Dorfman HD, Nathanson SD, Haggar AM and Wu KK : Primary malignant giant cell tumor of bone :“Dedifferentiated”giant cell tumor. Mod Pathol 2 : 541-546, 1989.