Branching ratio and CP-asymmetry of Bs→ρ(ω)K decays in the perturbative QCD approach Zhen-Jun Xiao, Xin-Fen Chen and Dong-Qin Guo Eur. Phys. J. C, 50 2 (2007) 363-371 Published online: 03 February 2007 DOI: 10.1140/epjc/s10052-007-0209-7