Siamac Fazli Florin Popescu Márton Danóczy Benjamin Blankertz Klaus-Robert Müller Cristian Grozea Subject-independent mental state classification in single trials. 1305-1312 2009 22 Neural Networks 9 http://dx.doi.org/10.1016/j.neunet.2009.06.003 db/journals/nn/nn22.html#FazliPDBMG09