MR Imaging of the Spinal Cord:Current Status and Futue Advances
AJR 159:149-159, Sze,G., 1992
Medical Implications of Computed Tomography ("Cat scanning")
NEJM 298:255, Abrams,H.L.,et al, 1978
Surgical Lesions Misdiagnosed as Multiple Sclerosis-Indication for Contrast Study
Milit Med 141:378, Finelli,P.F., 1976