Real-time brain computer interface using imaginary movementsAhmad El-Madani, Helge BD Sorensen, Troels W. Kjær, Carsten E. Thomsen and Sadasivan PuthusserypadyEPJ Nonlinear Biomed Phys, 3 1 (2015) 9DOI: https://doi.org/10.1140/epjnbp/s40366-015-0024-2