@article{5745, title = {Overlap and refractory effects in a Brain-Computer Interface speller based on the visual P300 Event-Related Potential}, author = {Martens, SMM. and Hill, NJ. and Farquhar, J. and Sch{\"o}lkopf, B.}, journal = {Journal of Neural Engineering}, volume = {6}, number = {2}, pages = {1-9}, organization = {Max-Planck-Gesellschaft}, school = {Biologische Kybernetik}, month = apr, year = {2009}, doi = {10.1088/1741-2560/6/2/026003}, month_numeric = {4} }