Observational constraints on Rastall’s cosmology C. E. M. Batista, Júlio C. Fabris, Oliver F. Piattella and A. M. Velasquez-Toribio Eur. Phys. J. C, 73 5 (2013) 2425 Published online: 08 May 2013 DOI: 10.1140/epjc/s10052-013-2425-7