1. Danielczyk, W., J. Neural Transm., 1995, vol. 46, p. 399.
2. Lyons, K.E. and Pahwa, R., Parkinson’s Desease, 2005, p. 685.
3. Smith, J.P., PCT Int. Appl. WO 9843625, 1998.
4. Leophonte, P., Bull. Acad. Nat. Med., 2005, vol. 189, p. 341.
5. Hughes, P.M., Olejnik, O., and Schiffman, R., US Patent Appl. Publ. no. 2005/031652, 2005.