FORSTER, Mark C; KUMAR, Senthil; RAJAN, Rohan A; GUY ATHERTON, W; ASIRVATHAM, Rajan; THAVA, Vallipuram R. Head-at-risk signs in Legg-Calvé-Perthes disease: Poor inter- and intra-observer reliability. Acta Orthopaedica, [S. l.], v. 77, n. 3, p. 413–417, 2006. DOI: 10.1080/17453670610046334. Disponível em: https://actaorthop.org/actao/article/view/19195. Acesso em: 26 apr. 2026.