  In lattice QCD the computation of one-particle irreducible (1PI) Green's
functions with a large number (> 2) of legs is a challenging task. Besides
tuning the lattice spacing and volume to reduce finite size effects, the
problems associated with the estimation of higher order moments via Monte Carlo
methods and the extraction of 1PI from complete Green's functions are
limitations of the method. Herein, we address these problems revisiting the
calculation of the three gluon 1PI Green's function.
