Szulik, M., and Z. Kalarus. “Rivaroxaban – New Possibilities of Anticoagulation in Atrial Fibrillation”. Medycyna Faktow (J EBM), Vol. 4, no. 4(13), Dec. 2011, pp. 23-25, https://journalsmededu.pl/index.php/jebm/article/view/2501.