Tanya Sapundzhieva, Lyubomir Sapundzhiev, and Anastas Batalov, “Mini-enthesitis can differentiate rheumatoid arthritis from psoriatic arthritis: A comprehensive comparative ultrasound study of the joints and mini-entheses of the hands”, Archives of Rheumatology, vol. 40, no. 1, pp. 028–041, Mar. 2025.