Equation-of-state formalism for dark energy models on the brane and the future of brane universes Artyom V. Astashenok, Emilio Elizalde, Sergei D. Odintsov and Artyom V. Yurov Eur. Phys. J. C, 72 12 (2012) 2260 Published online: 28 December 2012 DOI: 10.1140/epjc/s10052-012-2260-2