Nacharov, P. V., O. Konoplev, Y. Preobrazhenskaya, M. Drozdova, and G. Zakharova. “Etiological Issues of Chronic Tonsillitis”. Patologicheskaya Fiziologiya I Eksperimental’naya Terapiya (Pathological physiology and experimental Therapy), vol. 65, no. 3, Sept. 2021, pp. 91-97, doi:10.25557/0031-2991.2021.03.91-97.