MSSM Higgs bosons production at e+e- colliders

We study the production of the Higgs bosons predicted in the Minimal Supersymmetric extension of the Standard Model (h(0),H-0,A(0),H+/-), with the reactions e(+)e(-) --> b (b) over barh(0)(H-0,A(0)), and e(+)e(-) --> tau(-)(nu) over bar H-tau(+),tau(+)nu(tau)H(-), using the helicity formalism. We evaluate cross section of h(0),H-0,A(0) and H+/- in the limit when tan 0 is large. The numerical computation is done considering two stages of a possible Next Linear e(+)e(-) Collider: the first with root5 = 500 GeV and design luminosity 50 fb(-1), and the second with root5 = 1 TeV and luminosity 100-200 fb(-1).