1. : Subcortical dementia. In (eds): Alzheimer's Disease: Senile Dementia and Related Disorders. New York, Raven, 1978, pp 173-180
2. : Adverse clinical side effects of levodopa therapy. In (eds): Recent Advances in Parkinson's Disease. Philadelphia, Davis, 1971
3. Untersuchungen zur Psychologie des Parkinsonismus
4. : Age changes in speed of behavior: its central nature and physiological correlates. In (eds): Behavior, Aging, and the Nervous System. Springfield, IL, Thomas, 1965