Rybachuk, Ann, Zoriana Hbur, Oksana Zavada, and Irina Krylova. “Malignant Neoplasms of the Lips, Oral Cavity and Pharynx – State of the Problem”. Journal of Education, Health and Sport 11, no. 11 (November 30, 2021): 346–357. Accessed December 5, 2023. https://apcz.umk.pl/JEHS/article/view/37922.