Dimova, Zhaklin, Vladimira Boyadzhieva, Nikolay Stoilov, Simeon Monov, and Rumen Stoilov. “COVID-19 IN AUTOIMMUNE RHEUMATIC DISEASES - FREQUENCY, COURSE, EFFECTIVENESS AND COMPLICATIONS IN VACCINATION”. Rheumatology (Bulgaria) 29, no. 4 (November 8, 2021): 87-98. Accessed April 12, 2026. https://rheumatologybg.org/journalold/index.php?journal=revmatologiia&page=article&op=view&path[]=134.