1. Ferlay J, Steliarova-Foucher E, Lortet-Tieulent J, Rosso S, Coebergh JWW, Comber H, Forman D, Bray F (2013) Cancer incidence and mortality patterns in Europe: estimates for 40 countries in 2012. Eur J Cancer 49:1374–1403
2. Didkowska J, Wojciechowska U, Sosnowski R In-depth analysis of epidemiological data, geographic differentiation and differentiation of morbidity and mortality due to urothelial diseases National Cancer Registry, Center for Oncology - Maria Skłodowska-Curie Institute.
http://onkologia.org.pl/raporty/
. Access 15 Dec 2015
3. Didkowska J, Wojciechowska U Malignant neoplasms in Poland in 2013. National Cancer Registry, Center for Oncology - Maria Skłodowska-Curie Institute.
http://onkologia.org.pl/raporty/
. Access 3 Mar 2016
4. Valko M, Izakovic M, Mazur M, Rhodes CJ, Telser J (2004) Role of oxygen radicals in DNA damage and cancer incidence. Mol Cell Biochem 266:37–56
5. Kong Q, Beel JA, Lillehei KO (2000) A threshold concept for cancer therapy. Med Hypotheses 5:529–535