L. A. Farwell and E. Donchin, Talking off the top of your head: toward a mental prosthesis utilizing event-related brain potentials, Electroencephalography and Clinical Neurophysiology, vol.70, issue.6, pp.510-523, 1988.
DOI : 10.1016/0013-4694(88)90149-6

A. Wald, Sequential analysis, 1947.

M. Bernardo-dal-seno, L. Matteucci, and . Mainardi, Online detection of p300 and error potentials in a bci speller, Intell. Neuroscience, 2010.

O. Chapelle, A. Schölkopf, and . Zien, Semi-supervised learning, 2006.
DOI : 10.7551/mitpress/9780262033589.001.0001

E. Maby, G. Gibert, P. E. Aguera, M. Perrin, J. Bertrand et al., The openvibe p300-speller scenario: a thorough online evaluation, Human Brain Mapping Conference, 2010.

L. Rabiner, A tutorial on hidden Markov models and selected applications in speech recognition, Proceedings of the IEEE, vol.77, issue.2, pp.257-286, 1989.
DOI : 10.1109/5.18626

P. Kindermans, H. Verschore, D. Verstraeten, and B. Schrauwen, A p300 bci for the masses: Prior information enables instant unsupervised spelling, Advances in Neural Information Processing Systems, 2012.

C. M. Bishop, Pattern recognition and machine learning, p.382, 2006.