Аннотация:The trilinear and the quartic couplings of physical Higgs bosons
in the MSSM with explicit CP~violation in the two-doublet Higgs
sector are calculated within the framework of the CPX scenario.
The magnitude of an effective coupling changes several times with the
variation of the CP violating phase ${\tt arg}(\mu A)$, being very
sensitive to the
radiative corrections taken at the one-loop/two-loop level. At the
phase values around $\pi/2$ zeroes of selfcouplings take place.