The effect of new operators that only modify the bosonic couplings of
the Higgs boson, without altering the WW gamma or WWZ three-point func
tions, are examined in the e(+)e(-) --> ZZ gamma and Z gamma gamma pro
cesses. We analyse the constraints on these interactions that can be i
mposed by the LEP II collider at CERN and at the Next Linear Collider.
(C) 1998 Elsevier Science B.V.