Dimitrov, Stoimen, Vassilia Terzieva, Georgi Kotov, Mariana Ivanova, and Zlatimir Kolarov. “IgG4-Related Disease: Current Principles and Approaches in Diagnosis and Treatment”. Rheumatology (Bulgaria) 34, no. 1 (May 1, 2026): 21–42. Accessed October 13, 2026. https://rheumatologybg.org/journal/rbj/article/view/117.