1. Oral cavity and pharyngeal cancer among Department of veterans affairs hospital discharges;Federle;J Public Health Dent,1995
2. Nandkumar A. Consolidated report of the population based cancer registries 1990–1996; Incidence and distribution of cancer. National Cancer Registry Programme by ICMR, New Delhi, 1996.
3. Histopathological typing of cancer and precancer of the oral mucosa;Pindborg,1997
4. Cancer of the base of the tongue: past and future;Brunin;Head Neck,1999
5. Forty years of monitoring head and neck cancer in Norway-no good news;Mork;Anticancer Res,1998