Coherence and mixedness of neutrino oscillations in a magnetic field Podist Kurashvili, Levan Chotorlishvili, Konstantin Kouzakov and Alexander Studenikin Eur. Phys. J. C, 81 4 (2021) 323 Published online: 16 April 2021 DOI: 10.1140/epjc/s10052-021-09039-2