  An elementary Higgs boson, which is the remnant of the spontaneous symmetry
breaking mechanism in the Standard Model, remains one of the most elusive
particles. If a Higgs boson candidate is found at future accelerators, it
becomes necessary to determine its properties, beyond the mass, production
cross section and decay rates. The other crucial properties relate to the
self-couplings of the Higgs boson, which are necessary to reconstruct the Higgs
potential, and thereby confirm the mechanism of spontaneous symmetry breaking.
In this paper we review the question of the measurability of some of the
trilinear couplings of the neutral Higgs bosons of the Minimal Supersymmetric
Standard Model at a high-energy e+e- collider.
