Jessica A Stanich, John D Carter, Judith Whittum-Hudson, Alan P Hudson, Rheumatoid arthritis: Disease or syndrome?, Open Access Rheumatology : Research and Reviews 1, 2009-12-08, עמ' 179–192
Ates A, Karaaslan Y, Aksaray S. Predictive value of antibodies to cyclic citrullinated peptide in patients with early arthritis.Clinical rheumatology. 2006 May 3. PMID16670828