Rephasing Invariant Parametrization of Flavor Mixing Matrices
  The three-flavor mixing matrix can be parameterized by the rephasing invariants Gamma_{ijk} = V_{1i} V_{2j} V_{3k}. This formulation brings out the inherent symmetry of the problem and has some appealing features. Examples illustrating the parametrization and applications to quark mixing are presented. 
T. K. Kuo, Tae-Hun Lee