Observation of Y(3940) --> J/psiomega in B --> J/psiomegaK at BABAR. - Aubert B; Bona M; Boutigny D; Karyotakis Y; Lees JP; Poireau V; Prudent X; Tisserand V; Zghiche A; Garra Tico J; Grauges E; Lopez L; et al. (Physical review letters, 2008)