Kubiatowski , T., and T. Jankowski. “The Role of Human Recombinant Erythropoietin in Treatment of Anemia in Cancer Patients”. Medycyna Faktow (J EBM), Vol. 10, no. 1(34), Mar. 2017, pp. 14-21, https://www.journalsmededu.pl/index.php/jebm/article/view/2163.