Relationship of the dura, Hofmann's ligaments, Batson's plexus, and a fibrovascular membrane lying on the posterior surface of the vertebral bodies and attaching to the deep layer of the posterior longitudinal ligament. An anatomical, radiologic, and clinical study - Wiltse,L.L.; Fonseca,A.S.; Amster,J.; Dimartino,P.; Ravessoud,F.A. (Spine, 1993)