1. Aromatic Amino Acids and Modification of Parkinsonism
2. L‐dopa in Parkinson's syndrome;Cotzias G. C.;New Engl. J. med.,1969
3. Modifications of Parkinsonism—Chronic treatment with L‐dopa;Cotzias G. C.;New Engl. J. Med.,1969
4. Treatment of Parkinsonism With Levodopa