1. Biquard, O.: Asymptotically Symmetric Einstein Metrics, AMS Monographs, vol. 13. American Mathematical Society. https://www.ams.org/publications/authors/books/postpub/smfams-13 (2006)
2. Calderbank, D.M.J., Singer, M.: Einstein metrics and complex singularities. Invent. Math. 156, 405–443 (2004). https://doi.org/10.1007/s00222-003-0344-1
3. Fefferman, C., Graham, C.R.: Conformal invariants, Élie Cartan et les mathématiques d’aujourd’hui, Astérisque, no. S131. http://www.numdam.org/item/AST_1985__S131__95_0 (1985)
4. Fine, J.: A gauge theoretic approach to anti-self-dual Einstein metrics. http://arxiv.org/abs/1111.5005 (2011)
5. Fine, J., Herfray, Y., Krasnov, K., Scarinci, C.: Asymptotically hyperbolic connections. Class. Quantum Grav. 33(18), 185011 (2016). https://doi.org/10.1088/0264-9381/33/18/185011