Friedrich, M. J. (2004). "Harnessing Brain Signals Shows Promise for Helping Patients with Paralysis". JAMA. 291 (18): 2179–81. doi:10.1001/jama.291.18.2179. PMID15138229.
Friedrich, M. J. (2004). "Harnessing Brain Signals Shows Promise for Helping Patients with Paralysis". JAMA. 291 (18): 2179–81. doi:10.1001/jama.291.18.2179. PMID15138229.