Friedrich, Helmut Geometric Analysis and Gravitation, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
1212.0729 (Preprint), 117KB
CQG_30_6_065001.pdf (Any fulltext), 183KB
Bizon, P., & Friedrich, H. (2013). A remark about wave equations on the extreme Reissner-Nordström black hole exterior. Classical and quantum gravity, 30(6): 065001. doi:10.1088/0264-9381/30/6/065001.