Fermionic observables in Numerical Stochastic Perturbation Theory
  We present technical details of fermionic observables computations in NSPT. In particular we discuss the construction of composite operators starting from the inverse Dirac operator building block, the subtraction of UV divergences and the treatment of irrelevant contributions in extracting the continuum limit. 
V. Miccio, F. Di Renzo, A. Mantovi, C. Torrero and L. Scorzato