Krusienski DJ, Schalk G, McFarland DJ, Wolpaw J. A µ-rhythm Matched Filter for  Continuous Control of a Brain-Computer Interface. IEEE Trans Biomed Eng [Internet]. 2007;54(2):273-80. http://www.ncbi.nlm.nih.gov/pubmed/17278584

Kübler A, Nijboer F, Mellinger J, Vaughan TM, Pawelzik H, Schalk G, et al.. Patients with ALS can use sensorimotor rhythms to operate a brain-computer interface. Neurology [Internet]. 2005;64(10):1775-7. http://www.ncbi.nlm.nih.gov/pubmed/15911809

Leuthardt EC, Schalk G, Wolpaw J, Ojemann JG, Moran D. A brain-computer interface using electrocorticographic signals in humans. J Neural Eng [Internet]. 2004;1(2):63-71. http://www.ncbi.nlm.nih.gov/pubmed/15876624