Troessaert, Cédric AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
1704.06223.pdf (Preprint), 225KB
Troessaert, C. (2018). The BMS4 algebra at spatial infinity. Classical and quantum gravity, 35(7): 074003. doi:10.1088/1361-6382/aaae22.