OPPORTUNITIES FOR SURGICAL TREATMENT OF ELDERLY PATIENTS WITH HEAD AND NECK TUMORS Статья Yakovleva L.P., Kropotov M.A., Khodos A.V., Tigrov M.S., Vyalov A.S., Gavrishchuk P.A., Bochkar V.A., Guseinov I.I., Alizade G.R. ORAL ONCOLOGY. ELSEVIER. Том 118. 2021.