Parameterized Relativistic Dynamical Formalism for Transitions between   Three Flavor States
  Parameterized relativistic dynamics (PRD) is a manifestly covariant quantum theory with invariant evolution parameter. The theory has been applied to neutrino flavor oscillations between two mass states. It is generalized here to transitions between three mass states and applied to electron neutrino oscillations. 
John R. Fanchi
hep-ph