BØRGESEN, E.; VANG, P. S. Extradural Pseudocysts: A Cause of Pain after Lumbar-Disc Operation. Acta Orthopaedica, [S. l.], v. 44, n. 1, p. 12–20, 1973. DOI: 10.3109/17453677308988669. Disponível em: https://actaorthop.org/actao/article/view/29678. Acesso em: 14 may. 2026.