TY - RPRT TI - "Virtual keyboard" controlled by spontaneous EEG activity. AU - B Obermaier AU - G R Müller AU - G Pfurtscheller PY - 2003 DO - 10.1109/tnsre.2003.816866 UR - https://pubmed.ncbi.nlm.nih.gov/14960119/ ID - 14960119 ER -