  We review the general procedure for the field-theoretical computation of
wrapping effects in standard and beta-deformed N=4 super Yang-Mills by means of
N=1 superspace techniques. In the undeformed theory, these methods allowed to
find explicit results at four and five loops for two-impurity operators. In the
deformed case, a general expression for the finite-size correction to the
anomalous dimension of single-impurity operators at the critical order was
obtained.
