KEPEKÇİ, Yalçın, Can BOĞA, Mustafa DEMİRTAŞ, and Osman UÇARER. 1992. “Echocardiographic and Electrocardiographic Abnormalities in Ankylosing Spondylitis”. European Journal of Therapeutics 3 (2):149-54. https://doi.org/10.58600/eurjther.19920302-1033.