1. Bravo, G., and Cooper, 1. S. (1957). J. Amer. Geriat. Soc., 5, 651.
2. Anatomical and Radiological Correlations in Relation to the Placement of Therapeutic Lesions into the Basal Ganglia;Bravo, G.; Cooper, 1. S,1958
3. The Neurosurgical Alleviation of Parkinsonism. Charles C;Cooper, I.S.,1956
4. Cooper, I. S. and Bravo, G. (1958a). J. Neurosurg., 15, 244.
5. Cooper, I. S. (1958b). Neurology, 8, 344.