https://arxiv.org/abs/2311.07408
[2311.07408] Boundedness and Decay for the Teukolsky System in Kerr-Newman Spacetime I: The Case...
Abstract page for arXiv paper 2311.07408: Boundedness and Decay for the Teukolsky System in Kerr-Newman Spacetime I: The Case $|a|, |Q| \ll M$