A new type of CP symmetry, family replication and fermion mass hierarchies M. Maniatis, A. von Manteuffel and O. Nachtmann Eur. Phys. J. C, 57 4 (2008) 739-762 Published online: 01 October 2008 DOI: 10.1140/epjc/s10052-008-0726-z