Martisius, I., R. Damasevicius, V. Jusas, and D. Birvinskas. “Using Higher Order Nonlinear Operators for SVM Classification of EEG Data”. Elektronika Ir Elektrotechnika, vol. 119, no. 3, Mar. 2012, pp. 99-102, doi:10.5755/j01.eee.119.3.1373.