NILSONNE, Harald. Über Seitlich Bewegliches Fussgelenk in Prothese. Acta Orthopaedica, [S. l.], v. 7, n. 2, p. 201–203, 1936. DOI: 10.3109/17453673608988880. Disponível em: https://actaorthop.org/actao/article/view/31306. Acesso em: 16 may. 2026.