1. Aguilar J., Combes J.M.: A class of analytic perturbations for one-body Schrödinger Hamiltonians. Commun. Math. Phys 22, 269–279 (1971)
2. Andersson, L., Blue, P.: Hidden symmetries and decay for the wave equation on the Kerr spacetime, http://arxiv.org/abs/0908.2265v2 [math.Ap], 2009
3. Bachelot A.: Gravitational scattering of electromagnetic field by Schwarzschild black hole. Ann. Inst. H. Poincaré Phys. Théor. 54, 261–320 (1991)
4. A. Bachelot, Scattering of electromagnetic field by de Sitter–Schwarzschild black hole in Non-linear hyperbolic equations and field theory. Pitman Res. Notes Math. Ser. 253, London: Pitman, 1992, pp. 23–35
5. Bachelot A., Motet-Bachelot A.: Les résonances d’un trou noir de Schwarzschild. Ann. Inst. H. Poincaré Phys. Théor. 59, 3–68 (1993)