Doubling of the algebra and neutrino mixing within noncommutative spectral geometry - Doubling of the algebra and neutrino mixingMaria Vittoria Gargiulo, Mairi Sakellariadou and Giuseppe VitielloEur. Phys. J. C, 74 1 (2014) 2695DOI: https://doi.org/10.1140/epjc/s10052-013-2695-0