FILIPESCU, I. C., A. OPRIŞ, H. POPOV, and S. REDNIC. “Malignancies and Biologic Therapy in Rheumatoid Arthritis: A Retrospective Study”. Applied Medical Informatics, vol. 32, no. 1, Feb. 2013, pp. 69-76, https://ami.info.umfcluj.ro/index.php/AMI/article/view/409.