1. Ackerman, L. V.: Verrucous carcinoma of the oral cavity. Surgery 23, 670–678 (1948)
2. Ackerman, L. V.: Surgical Pathology, 4th ed. pp. 159 and 193. St. Louis: The G. V. Mosby Co. 1968
3. Biller, H. F., Ogura, J. H., Bauer, W. C.: Verrucous cancer of the larynx. Laryngoscope (St. Louis) 81, 1323–1329 (1971)
4. Cardo, V. A., Stratigos, G. T.: Verrucous carcinoma of the palate: report of case. J. Oral Surg. 31, 61–63 (1973)
5. Fonts, R. A., Greenlaw, R. H., Rusk, B. F., Rowin, S.: Verrucous squamous cell carcinoma of the oral cavity. Cancer (Philad.) 23, 152–160 (1969)