1. Abbott, F.V. and Melzack, R., Analgesia produced by stimulation of limbic structures and its relation to epileptiform discharges, Exp. Neurol., 62 (1978) 720–734.
2. Ballantine, H.T., Cassidy, W.L., Flanagan, N.B. and Marino, R., Stereotaxic anterior cingulotomy for neuropsychiatric illness and intractable pain, J. Neurosurg., 26 (1967) 488–495.
3. Bouckoms, A.F., Limbic surgery for pain. In P.D. Wall and R. Melzack (Eds.), Textbook of Pain, Churchill Livingstone, New York, 1994, pp. 1171–1187.
4. Bragin, E.O., Yeliseeva, Z.V., Vasilenko, G.F., Meizerbov, E.E., Churin, B.T. and Durinyan, R.A., Cortical projections to the periaqueductal grey in the cat: A retrograde horseradish peroxidase study, Neurosci. Lett., 51 (1984) 271–275.
5. Casey, K.L., Minoshima, S., Berger, K.L., Koeppe, R.A., Morrow, T.J. and Frey, K.A., Positron emission tomographic analysis of cerebral structures activated specifically by repetitive noxious heat stimuli, J. Neurophsyiol., 71 (1994) 802–807.