Neutralino dark matter in the MSSM with CP violation
  In the MSSM, the presence of CP phases can have a significant impact on the neutralino relic abundance. These phase effectsare on the one hand due to shifts in the masses, on the other hand due to modifications of the couplings. Typical variations in Omega h^2 solely from modifications in the couplings are of order 10%-100%. 
G. Belanger, F. Boudjema, S. Kraml, A. Pukhov, A. Semenov