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It is shown that the one-boson-exchange potential is too weak to generate dynamcally $\\bar{D}_s D$, $\\bar{D}^*_s D$, and $\\bar{D}_sD^*$ states, while for the case of $\\bar{D}^*_s D^*$, very loosely bound states are likely, with binding energies of the order of several MeV. 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