YRJÖNEN, Timo; POUSSA, Mikko; HOIKKA, Veijo; ÖSTERMAN, Kalevi. Poor prognosis in atypical Perthes’ disease. Acta Orthopaedica, [S. l.], v. 63, n. 4, p. 399–402, 1992. DOI: 10.3109/17453679209154753. Disponível em: https://actaorthop.org/actao/article/view/22022. Acesso em: 4 may. 2026.