Optimizing the Performances of a P300-Based Brain-Computer Interface in Ambulatory Conditions. - Thierry Castermans; Matthieu Duvinage; Mathieu Petieau; Thomas Hoellinger; Caty De Saedeleer; Karthik Seetharaman; Ana Bengoetxea; Guy Cheron; Thierry Dutoit (IEEE J. Emerg. Sel. Topics Circuits Syst., 2011)