  In the minimal supersymmetric standard model with explicit CP violation,
associated production of the lightest Higgs boson with heavier ones is
analyzed. Due to explicit CP violation, the Higgs bosons are no longer CP
eigenstates so that both of the heavy Higgs bosons contribute to the process.
While the radiative corrections in the Higgs sector turn out to be quite
important, the vertex radiative corrections remain small as in the CP
conserving theory.
