  We calculate the multipoint Green functions in 1+1 dimensional integrable
quantum field theories. We use the crossing formula for general models and
calculate the 3 and 4 point functions taking in to account only the lower
nontrivial intermediate states contributions. Then we apply the general results
to the examples of the scaling $Z_{2}$ Ising model, sinh-Gordon model and
$Z_{3}$ scaling Ising model. We demonstrate this calculations explicitly. The
results can be applied to physical phenomena as for example to the Raman
scattering.
