Multi-component dark matter: the vector and fermion case Aqeel Ahmed, Mateusz Duch, Bohdan Grzadkowski and Michal Iglicki Eur. Phys. J. C, 78 11 (2018) 905 Published online: 09 November 2018 DOI: 10.1140/epjc/s10052-018-6371-2