Claiborne Ray, C. (July 22, 2003). "Q & A; Head and Hand Tremors". The New York Times. Archived from the original on November 13, 2013. Retrieved November 3, 2013.
Claiborne Ray, C. (July 22, 2003). "Q & A; Head and Hand Tremors". The New York Times. Archived from the original on November 13, 2013. Retrieved November 3, 2013.