Mueller-Putz G, del Millán JR, Schalk G, Mueller KR. The Plurality of Human Brain-Computer Interfacing. Proceedings of the IEEE [Internet]. 2015;:868-870. http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7115302

Blankertz B, Müller K-R, Krusienski DJ, Schalk G, Wolpaw J, Schlögl A, et al.. The BCI competition III: Validating alternative approaches to actual BCI problems. IEEE Trans Neural Syst Rehabil Eng [Internet]. 2006;14(2):153-9. http://www.ncbi.nlm.nih.gov/pubmed/16792282