Rybachuk, A., Z. Hbur, O. Zavada, and I. Krylova. “Malignant Neoplasms of the Lips, Oral Cavity and Pharynx – State of the Problem”. Journal of Education, Health and Sport, vol. 11, no. 11, Nov. 2021, pp. 346-57, doi:10.12775/JEHS.2021.11.11.033.