THORNGREN, Karl-Göran. Cost comparison in hip fracture treatment. Acta Orthopaedica, [S. l.], v. 62, n. sup241, p. 38–39, 1991. DOI: 10.3109/17453679109155104. Disponível em: https://actaorthop.org/actao/article/view/22300. Acesso em: 3 may. 2026.