1. Beani L, Bianchi C., Gomirato G., Pefetti C., Cartei M.:Rilievi sperimentali e clinici sul meccanismo di azione dell'amantadina e sulla sua efficacia nel morbo di Parkinson. Minerva Medica 82, 3948, 1971.
2. Evans A.S.:Viral infections of humans. Publ.: John Wiley and Sons, 1976.
3. Gomirato G., Hydén H.:A biochemical glia error in the Parkinson disease. Brain, 36, 773, 1963.
4. Hornykiewicz O.:Dopamine (3-hydroxytyramine) and brain function. Pharmacol. Rev. 18, 925, 1966.
5. Mims C. A.:Factors in the mechanism of persistence of viral infections. Progr. Med. Viral 18, 1, 14, 1974.