1. Abbott, RA, Cox, M, Markus, H & Tomkins, A (1992). Diet, body size and micronutrient status in Parkinson's disease. Eur. J. Clin. Nutr., 46, 879–884.
2. Ahlskog, JE (2001). Parkinson's disease: medical and surgical treatment. Neurol. Clin., 19, 579–605.
3. Angeli, F (ed.) (2001). Indagine ‘Condizioni di salute e ricorso a servizi sanitari’ 1999/2000, [Investigation ‘Health conditions and usage of health services’ 1999/2000] Rome: National Institute of Statistics
4. Beyer, PL, Palarino, MY, Michalek, D, Busenbark, K & Koller, WC (1995). Weight change and body composition in patients with Parkinson's disease. J. Am. Diet. Assoc., 95, 979–983.
5. Broussolle, E, Borson, F, Gonzalez de Suso, JM, Cayvialle, JA, Beylot, M & Chazot, G (1991). Increase of energy expenditure in Parkinson's disease. Rev. Neurol., 147, 46–51.