FRIHAGEN, Frede. On the diagnosis and treatment of femoral neck fractures. Acta Orthopaedica, [S. l.], v. 80, n. sup335, p. 1–26, 2009. DOI: 10.1080/17453690610046611. Disponível em: https://actaorthop.org/actao/article/view/18852. Acesso em: 26 apr. 2026.