Neutrino Oscillations and Time-Energy Uncertainty Relation
  Neutrino oscillations is a phenomenon which is characterized by a finite oscillation time (length). For such phenomena time-energy uncertainty relation is valid. This means that energy uncertainty is needed for oscillations to occur. We consider neutrino oscillations from this point of view. We demonstrate that for mixed neutrino states, which describe flavor neutrinos $\nu_{e}$, $\nu_{\mu}$ and $\nu_{\tau}$, translational invariance does not take place. 
S. M. Bilenky