Galactic escape speeds in mirror and cold dark matter models Alvin J. K. Chua, D. T. Wickramasinghe and Lilia Ferrario Eur. Phys. J. C, 73 1 (2013) 2259 Published online: 15 January 2013 DOI: 10.1140/epjc/s10052-012-2259-8