1) Lane, N.: Pseudosarcoma (polypoido sarcomalike masses) associated with squamous-cell carcinoma of the mouth, fase, and larynx. Cancer 10: 19-41 1957.
2) Willis, R., A.: Carcino-sarcoma. Pathology of the tumor 2: 140-142 1960.
3) Lichtiger, B. Mackay, B. et al: spindle cell valiant of squamous cell carcinoma. A light and electron microscopic study of 13 cases. Cancer 26: 1311-1320 1970.
4) Battifora, H.: Spindle cell carcinoma. Ultrastructural evidence of squamous origin and collagen production by the tumor cells. Cancer37: 2275-2282 1976.