Suzuki, Shigeo, Yoshitaka Kasahara, Yoichi Seto, Toru Futami, Kengo Furukawa, and Yoshihito Nishino. 1994. “Arthroscopy in 19 Children With perthes’ Disease: Pathologic Changes of the Synovium and the Joint Surface”. Acta Orthopaedica 65 (6):581-84. https://doi.org/10.3109/17453679408994608.