Analysis of the Y(4140) and related molecular states with QCD sum rules Zhi-Gang Wang, Zhi-Cheng Liu and Xiao-Hong Zhang Eur. Phys. J. C, 64 3 (2009) 373-386 Published online: 30 September 2009 DOI: 10.1140/epjc/s10052-009-1156-2