s-ordered phase-sum and phase-difference distribuitons of entangled   coherent states
  The $s$-ordered phase-sum and phase-difference distributions are considered for Bell-like superpositions of two-mode coherent states. The distributions are sensitive, respectively, to the sum and difference of the phases of the entangled coherent states. They show loss of information about the entangled state and may take on negative values for some orderings $s$. 
Adrian Alexandrescu and Diethard Schiller