Effective field theory calculation of conservative binary dynamics at   third post-Newtonian order
  We reproduce the two-body gravitational conservative dynamics at third post-Newtonian order for spin-less sources by using the effective field theory methods for the gravitationally bound two-body system, proposed by Goldberger and Rothstein. This result has been obtained by automatizing the computation of Feynman amplitudes within a Mathematica algorithm, paving the way for higher-order computations not yet performed by traditional methods. 
S. Foffa and R. Sturani
gr-qc hep-th