Allison BZ, Wolpaw EWinter, Wolpaw J. Brain-computer interface systems: progress and prospects. Expert review of medical devices [Internet]. 2007;4:463?474. http://www.ncbi.nlm.nih.gov/pubmed/17605682

Blankertz B, Müller K-R, Curio G, Vaughan TM, Schalk G, Wolpaw J, et al.. The BCI Competition 2003: progress and perspectives in detection and discrimination of EEG single trials. IEEE transactions on bio-medical engineering [Internet]. 2004;51:1044?1051. http://www.ncbi.nlm.nih.gov/pubmed/15188876