1. Sjöqvist, O., Eine neue Operationsmethode bei Trigeminusneuralgie: Durchschneidung des Tractus spinalis trigemini. Zbl. Neurochir.2 (1937?1938), 274?281.
2. White, J. C., and W. H. Sweet, Pain: Its mechanisms and neurosurgical control. Springfield, Ill.: Ch. C Thomas. 1955.
3. ? ?, Pain and the neurosurgeon: a forty-year experience. Springfield, Ill.: Ch. C Thomas. 1969.
4. Crue, B. L., Jr., E. M. Todd, E. J. A. Carregal, and O. Kilham, Percutaneous trigeminal tractotomy?case report utilizing stereotactic radiofrequency lesion. Bull. Los Angeles Neurol. Soc.32 (1967), 86?92.
5. - E. J. A. Carregal, and A. Felsoory, Percutaneous stereotaxic radiofrequency trigeminal tractotomy with neurophysiologic recordings. Presented at the American Association of Neurological Surgeons, Houston, Texas, April 18?21, 1971.