  Some practical applications of algebraic renormalization are discussed. In
particular we consider the two-loop QCD corrections to the three-gauge-boson
vertices involving photons, Z and W bosons. For this purpose also the
corresponding two-point functions have to be discussed. A recently developed
procedure is used to analyze the breaking terms of the functional identities
and explicit formulae for the universal counterterms are provided. Special
attention is devoted to the treatment of infra-red divergences.
