Zacharia BE, Kahn S, Bander ED, Cederquist GY, Cope WP, McLaughlin L, Hijazi A, Reiner AS, Laufer I, Bilsky M.  2017.  Incidence and risk factors for preoperative deep venous thrombosis in 314 consecutive patients undergoing surgery for spinal metastasis.. J Neurosurg Spine. 27(2):189-197.

Nguyen J, Nishimura N, Fetcho RN, Iadecola C, Schaffer CB.  2011.  Occlusion of cortical ascending venules causes blood flow decreases, reversals in flow direction, and vessel dilation in upstream capillaries.. J Cereb Blood Flow Metab. 31(11):2243-54.