Hinterberger, T., Weiskopf, N., Veit, R., Wilhelm, B., Betta, E., & Birbaumer, N. (2004).
An EEG-driven brain-computer interface combined with functional magnetic resonance imaging (fMRI).
IEEE Transactions on Biomedical Engineering, 51(6), 971-974. doi:10.1109/TBME.2004.827069.