EEG and the variance of motor evoked potential amplitude
Clinical EEG and Neuroscience (2006) - Comment
pubmed: 16929713  doi: 10.1177/155005940603700316  issn: 1550-0594  issn: 2169-5202 

P. Zarkowski, C.J. Shin, T. Dang, J. Russo, D. Avery