Taylor expansion of luminosity distance in Szekeres cosmological models:
  Effects of local structures evolution on cosmographic parameters
  We consider the Goode-Wainwright representation of the Szekeres cosmological
models and calculate the Taylor expansion of the luminosity distance in order
to study the effects of the inhomogeneities on cosmographic parameters. Without
making a particular choice for the arbitrary functions defining the metric, we
Taylor expand up to the second order in redshift for Family I and up to the
third order for Family II Szekeres metrics under the hypotesis, based on
observation, that local structure formation is over. In a conservative fashion,
we also allow for the existence of a non null cosmological constant.
