1. CDF collaboration, Evidence for a mass dependent forward-backward asymmetry in top quark pair production, Phys. Rev. D 83 (2011) 112003 [ arXiv:1101.0034 ] [ INSPIRE ].
2. D0 collaboration, V.M. Abazov et al., Forward-backward asymmetry in top quark-antiquark production, Phys. Rev. D 84 (2011) 112005 [ arXiv:1107.4995 ] [ INSPIRE ].
3. J.H. Kuhn and G. Rodrigo, Charge asymmetry of heavy quarks at hadron colliders, Phys. Rev. D 59 (1999) 054017 [ hep-ph/9807420 ] [ INSPIRE ].
4. J. Aguilar-Saavedra and M. Pérez-Victoria, Simple models for the top asymmetry: constraints and predictions, JHEP 09 (2011) 097 [ arXiv:1107.0841 ] [ INSPIRE ].
5. J. Aguilar-Saavedra, Overview of models for the $ t\overline{t} $ asymmetry, Nuovo Cim. C 035N3 (2012) 167 [ arXiv:1202.2382 ] [ INSPIRE ].