For citations:

Agafonova EM, Klyukvina NG, Urumova MM. Concurrence of systemic lupus erythematosus and psoriatic arthritis: literature data and a case report. Sovremennaya Revmatologiya=Modern Rheumatology Journal. 2018;12(4):123-128. (In Russ.) https://doi.org/10.14412/1996-7012-2018-4-123-128