(1) J. Wolpaw et al., "Brain-computer interfaces for communicatio- nand control", Clinical Neurophysiology, vol. 113, pp. 767-779, (2002).
(2) G. Pfurtscheller et al., "Mu rhythm (de)synchronization and EEG single-trial classification of different motor imagery tasks", Neurolmage, vol.31, issue 1, pp.153-159, (2006).
(3) C. Guger et al., "How many people are able to control a P300-based brain-computer interface (BCD?", Neuroscience Let- ters, vol.462, issue 1, pp.94-98, (2009).
(4) K. Inoue et al., "Robot Operation based on Pattern Recognition of EEG Signals", Proc. of the 3rd International Brain-Computer Interface Workshop and Training Course 2006, pp. 116-117, (2006).