Does Chaplygin gas have salvation? Juliano P. Campos, Júlio C. Fabris, Rafael Perez, Oliver F. Piattella and Hermano Velten Eur. Phys. J. C, 73 4 (2013) 2357 Published online: 10 April 2013 DOI: 10.1140/epjc/s10052-013-2357-2