  For several processes at colliding beams, macroscopically large impact
parameters give an essential contribution to the standard cross section. These
impact parameters may be much larger than the transverse sizes of the colliding
bunches. In that case, the standard calculations have to be essentially modify.
The corresponding formulae were given twenty years ago. In recent paper of
Baier and Katkov [17] it was claimed that the previous results about
bremsstrahlung spectrum have to be revised and an additional subtraction
related to the coherent contribution has to be done. This additional term has
been calculated with the result that it may be essential for the performed and
future experiments. In the present paper we analyze in detail the coherent and
incoherent contributions in the conditions, considered in paper [17]. In
contract to above claims, we found out that under these conditions the coherent
contribution is completely negligible and, therefore, there is no need to
revise the previous results.
