1. G. Dautcourt, PostNewtonian extension of the Newton-Cartan theory, Class. Quant. Grav. 14 (1997) A109 [gr-qc/9610036] [INSPIRE].
2. W. Tichy and E.E. Flanagan, Covariant formulation of the post-1-Newtonian approximation to General Relativity, Phys. Rev. D 84 (2011) 044038 [arXiv:1101.0588] [INSPIRE].
3. D. Van den Bleeken, Torsional Newton-Cartan gravity from the large c expansion of general relativity, Class. Quant. Grav. 34 (2017) 185004 [arXiv:1703.03459] [INSPIRE].
4. D. Hansen, J. Hartong and N.A. Obers, Action Principle for Newtonian Gravity, Phys. Rev. Lett. 122 (2019) 061106 [arXiv:1807.04765] [INSPIRE].
5. E. Cartan, Sur les variétés à connexion affine et la théorie de la rélativité généralisée (premiére partie), Ann. Sci. Éc. Norm. Supér. 40 (1923) 325.