Brunner P, Joshi S, Briskin S, Wolpaw J, Bischof H, Schalk G. Does the 'P300' speller depend on eye gaze? J Neural Eng [Internet]. 2010;7(5):056013. http://www.ncbi.nlm.nih.gov/pubmed/20858924

Wilson AJ, Mellinger J, Schalk G, Williams JC. A procedure for measuring latencies in brain-computer interfaces. IEEE Trans Biomed Eng [Internet]. 2010;57(7):1785-97. http://www.ncbi.nlm.nih.gov/pubmed/20403781