Hans J. P. Wouters Marcel A. J. van Gerven Matthias Sebastian Treder Tom Heskes Ali Bahramisharif Covert Attention as a Paradigm for Subject-Independent Brain-Computer Interfacing. 156-163 2011 MLINI https://doi.org/10.1007/978-3-642-34713-9_20 conf/nips/2011mlini db/conf/nips/mlini2011.html#WoutersGTHB11