Hennig, Jörg Geometric Analysis and Gravitation, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
grg41_2113.pdf (Publisher version), 465KB
0905.4179v2.pdf (Preprint), 282KB
Neugebauer, G., & Hennig, J. (2009). Non-existence of stationary two-black-hole configurations. General Relativity and Gravitation, 41, 2113-2130. doi:10.1007/s10714-009-0840-8.