Nowińska, M., J. Dziekońska, P. Grabowy, M. Drożak, and J. Milanowska. “Delays in Cancer Diagnosis, With a Focus on Oral Cancer During the COVID-19 Pandemic - Literature Review”. Journal of Education, Health and Sport, vol. 11, no. 9, Sept. 2021, pp. 162-9, doi:10.12775/JEHS.2021.11.09.021.