MULTIPLE PRODUCTION OF MSSM NEUTRAL HIGGS BOSONS AT HIGH-ENERGY E(-) COLLIDERS()E()

The cross sections for the multiple production of the lightest neutral Higgs boson at high-energy e(+)e(-) colliders are presented in the fr amework of the Minimal Supersymmetric extension of the Standard Model (MSSM). We consider production through Higgs-strahlung, associated pro duction of the scalar and the pseudoscalar bosons, and the fusion mech anisms for which we use the effective longitudinal vector-boson approx imation. These cross sections allow one to determine trilinear Higgs c ouplings lambda(Hhh) and lambda(hhh), which are theoretically determin ed by the Higgs potential.