Markiewicz , Jarosław, and JWirginiusz Dziewirski. “Merkel Cel Carcinoma”. OncoReview 4, no. 3(15) (September 30, 2014): 121-125. Accessed July 5, 2025. https://www.journalsmededu.pl/index.php/OncoReview/article/view/371.