HELLSTRÖM, John. Zur Kenntnis Der Operativen Behandlung Von Spondylolisthese. Acta Orthopaedica, [S. l.], v. 7, n. 2, p. 143–175, 1936. DOI: 10.3109/17453673608988877. Disponível em: https://actaorthop.org/actao/article/view/31303. Acesso em: 15 may. 2026.