Kochman, Maciej, Katarzyna Niemiec, Helena Bartyzel–Lechforowicz, and Mirosław Jabłoński. 2018. “Analysis of Oncological Diseases in the Subcarpathian Oncology Center in 2007 – 2011”. Journal of Education, Health and Sport 8 (12):403-15. https://apcz.umk.pl/JEHS/article/view/6391.