Joint Probabilities Reproducing Three EPR Experiments On Two Qubits
  An eight parameter family of the most general nonnegative quadruple probabilities is constructed for EPR-Bohm-Aharonov experiments when only 3 pairs of analyser settings are used. It is a simultaneous representation of 3 Bohr-incompatible experimental configurations valid for arbitrary quantum states. 
S.M. Roy, D. Atkinson, G. Auberson, G. Mahoux, V. Singh