Einstein and Rastall theories of gravitation in comparison F. Darabi, H. Moradpour, I. Licata, Y. Heydarzade and C. Corda Eur. Phys. J. C, 78 1 (2018) 25 Published online: 13 January 2018 DOI: 10.1140/epjc/s10052-017-5502-5