FRIBERG, Sten; HIRSCH, Carl. Anatomical and Clinical Studies on Lumbar Disc Degeneration. Acta Orthopaedica, [S. l.], v. 19, n. 2, p. 222–242, 1949. DOI: 10.3109/17453674908991095. Disponível em: https://actaorthop.org/actao/article/view/31228. Acesso em: 1 jun. 2026.