1. A. Strominger, Lectures on the Infrared Structure of Gravity and Gauge Theory, arXiv:1703.05448 [ INSPIRE ].
2. A. Seraj, Multipole charge conservation and implications on electromagnetic radiation, JHEP 06 (2017) 080 [ arXiv:1610.02870 ] [ INSPIRE ].
3. A. Strominger, Asymptotic Symmetries of Yang-Mills Theory, JHEP 07 (2014) 151 [ arXiv:1308.0589 ] [ INSPIRE ].
4. G. Barnich and P.-H. Lambert, Einstein-Yang-Mills theory: Asymptotic symmetries, Phys. Rev. D 88 (2013) 103006 [ arXiv:1310.2698 ] [ INSPIRE ].
5. M. Campiglia and R. Eyheralde, Asymptotic U(1) charges at spatial infinity, arXiv:1703.07884 [ INSPIRE ].