Extracting γ and penguin topologies through CP violation in Bs0 → J/φ KS Kristof Bruyn, Robert Fleischer and Patrick Koppenburg Eur. Phys. J. C, 70 4 (2010) 1025-1035 Published online: 18 November 2010 DOI: 10.1140/epjc/s10052-010-1495-z