1. P.R. Anderson, C. Molina-Paris and E. Mottola, Linear response, validity of semiclassical gravity and the stability of flat space, Phys. Rev. D 67 (2003) 024026 [ gr-qc/0209075 ] [ INSPIRE ].
2. I. Antoniadis, P.O. Mazur and E. Mottola, Conformal symmetry and central charges in four-dimensions, Nucl. Phys. B 388 (1992) 627 [ hep-th/9205015 ] [ INSPIRE ].
3. R. Armillis, C. Corianò and L. Delle Rose, Conformal Anomalies and the Gravitational Effective Action: The TJJ Correlator for a Dirac Fermion, Phys. Rev. D 81 (2010) 085001 [ arXiv:0910.3381 ] [ INSPIRE ].
4. R. Armillis, C. Corianò and L. Delle Rose, Trace Anomaly, Massless Scalars and the Gravitational Coupling of QCD, Phys. Rev. D 82 (2010) 064023 [ arXiv:1005.4173 ] [ INSPIRE ].
5. F. Bastianelli, O. Corradini and A. Zirotti, Dimensional regularization for N = 1 supersymmetric σ-models and the worldline formalism, Phys. Rev. D 67 (2003) 104009 [ hep-th/0211134 ] [ INSPIRE ].