Kosz, K., N. Zarankiewicz, M. Zielińska, and A. Kuchnicka. “Changes in Management of Patients With Cancer During COVID-19 Pandemic”. Journal of Education, Health and Sport, vol. 10, no. 9, Sept. 2020, pp. 577-90, doi:10.12775/JEHS.2020.10.09.070.