1. Jirout, J.: Pneumomyelography. Springfield, Ill.: Thomas 1969
2. DiChiro, G., Fisher, R. L.: Contrast radiography of the spinal cord. Arch. Neurol. 11, 125?143 (1964)
3. Nordqvist, L.: The sagittal diameter of the spinal cord and subarachnoid space in different age groups. A roentgenographic post-mortem study. Acta Radiol. (Suppl.) 227 (1964)
4. Khilnani, M. T., Wolf, B. S.: Transverse diameter of the cervical spinal cord on Pantopaque myelography. J. Neurosurg. 20, 660?664 (1963)
5. Porter, E. C.: Measurements of the cervical spinal cord in Pantopaque myelography. Amer. J. Roentgenol. 76, 270?272 (1956)