@inproceedings{felix2009linear,
title={Linear waves in the Kerr geometry: a mathematical voyage to black hole physics},
author={Felix Finster, Niky Kamran, Joel Smoller, and Shing-Tung Yau},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224204305415830154},
booktitle={Bulletin of the American Mathematical Society},
volume={46},
number={4},
pages={635-659},
year={2009},
}

Felix Finster, Niky Kamran, Joel Smoller, and Shing-Tung Yau. Linear waves in the Kerr geometry: a mathematical voyage to black hole physics. 2009. Vol. 46. In Bulletin of the American Mathematical Society. pp.635-659. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224204305415830154.