UDÉN, Giggl; NILSSON, Bo. Hip fracture frequent in hospital. Acta Orthopaedica, [S. l.], v. 57, n. 5, p. 428–430, 1986. DOI: 10.3109/17453678609014763. Disponível em: https://actaorthop.org/actao/article/view/23136. Acesso em: 9 may. 2026.