Kostyukevych, O. M. 2013. “Determining Level of Endogenous Serum Erythropoietin for Differential Diagnosis of Polycythemia Vera and Symptomatic Polycythemia”. Medicni Perspektivi 18 (2):66-73. https://doi.org/10.26641/2307-0404.2013.2.15950.