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Within the continuum model of graphene, we study the properties of energy spectrum of graphene quantum dots in the presence of an off-plane donor/acceptor Coulomb impurities as a function of their positions. We propose a variational scheme in which the trial wave functions take into account the confinement of the carriers of graphene quantum dot together with the influence of magnetic field. The dependence of graphene quantum dot states on the location of impurity is investigated in thedoi:10.17776/csj.14715 fatcat:sxxmmwew4vf4vn3yfw7onkmrze