1. The UPDRS Development Committee. Unified Parkinson's Disease Rating Scale. In: eds. Recent Developments in Parkinson's Disease, vol 2. Florham Park, NJ: Macmillan Healthcare Information, 1987: 153-163.
2. Rating scales in Parkinson's disease. In: eds. Parkinson's Disease and Movement Disorders. Baltimore, MD: Urban & Schwarzenberg, 1988: 235-242.
3. Effect of Deprenyl on the Progression of Disability in Early Parkinson's Disease
4. Progress in B;Goetz,1990
5. Unified Parkinson's disease rating scale characteristics and structure