UNANDER-SCHARIN, Lars. A Case of Spondylolisthesis Lumbalis Acquisita. Acta Orthopaedica, [S. l.], v. 19, n. 4, p. 536–544, 1950. DOI: 10.3109/17453675008991107. Disponível em: https://actaorthop.org/actao/article/view/31025. Acesso em: 15 may. 2026.