  When both B0 and B0bar can decay to the same final state composed of two
vectors, the interference between them and those among three polarization
states result in intricate phenomena. In this note we derive the time and
angular distributions for general B to Va Vb processes in a form convenient for
actual analyses. We then apply them to specific examples and clarify the CP
violating parameters obtainable in the D* rho and J/\psi K* final states. The
time distributions for the D*pi final states are also discussed.
