1. J. Parkinson, An Essay on the Shaking Palsy. Whittingham and Rowland for Sherwood, Neely and Jones, London, 1817
2. Parkinson's Disease: A Guide for the Patient and Family;Duvoisin,1995
3. G. Cohen, P. Werner, Free radicals, oxidative stress, and neurodegeneration, in: D.B. Calne (Ed.), Neurodegenerative Disease, Saunders, Philadelphia, 1994
4. Reduced and oxidized glutathione in the substantia nigra of patients with Parkinson's disease