Resonances for metric (and other) bottles.
Séminaire Équations aux dérivées partielles (Polytechnique), (1999-2000), Talk no. 15, 8 p.
@article{SEDP_1999-2000____A15_0,
     author = {Sj\"ostrand, Johannes},
     title = {Resonances for metric (and other) bottles.},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique)},
     publisher = {Centre de math\'ematiques Laurent Schwartz, \'Ecole polytechnique},
     year = {1999-2000},
     note = {talk:15},
     mrnumber = {1813178},
     zbl = {1069.35501},
     language = {en},
     url = {http://www.numdam.org/item/SEDP_1999-2000____A15_0}
}
Sjöstrand, Johannes. Resonances for metric (and other) bottles.. Séminaire Équations aux dérivées partielles (Polytechnique),  (1999-2000), Talk no. 15, 8 p. http://www.numdam.org/item/SEDP_1999-2000____A15_0/

[1] B. Helffer, J. Sjöstrand, Résonances en limite semiclassique, Bull. de la SMF 114(3), Mémoire 24/25 (1986). | Numdam | Zbl 0631.35075

[2] G. Popov, On the contribution of degenerate periodic trajectories to the wave-trace, Comm. Math. Phys., 196(2)(1998), 363–383. | MR 1645007 | Zbl 0924.58100

[3] V. Petkov, M. Zworski, Breit-Wigner approximation and the distribution of resonances, Comm. Math. Phys., 204(2)(1999), 329–351. | MR 1704278 | Zbl 0936.47004

[4] J. Sjöstrand, A trace formula and review of some estimates for resonances, p. 377–437 in Microlocal analysis and spectral theory, NATO ASI Series C, vol. 490, Kluwer 1997. | MR 1451399 | Zbl 0877.35090

[5] J. Sjöstrand, Resonances for bottles and trace formulae, Math. Nachr., to appear. | MR 1806367 | Zbl 0979.35109

[6] J. Sjöstrand, M. Zworski, Complex scaling and the distribution of scattering poles, J. of AMS 4(4)(1992), 1021–1035 | MR 1177304 | Zbl 0752.35046

[7] J. Sjöstrand, M. Zworski, Lower bounds on the number of scattering poles, Comm. PDE 18(5–6)(1993), 847–857. | MR 1218521 | Zbl 0784.35070

[8] P. Stefanov, Quasimodes and resonances: sharp lower bounds, Duke Math. J., 99(1)(1999), 75–92. | MR 1700740 | Zbl 0952.47013

[9] P. Stefanov, G. Vodev, Neumann resonances in linear elasticity for an arbitrary body, Comm. Math. Phys. 176(1996), 645–659. | MR 1376435 | Zbl 0851.35032

[10] S.U. Tang, M. Zworski, From quasimodes to resonances, Math. Res. Lett., 5(3)(1998), 261–272. | MR 1637824 | Zbl 0913.35101

[11] G. Vodev, On the distribution of scattering poles for perturbations of the Laplacian, Ann. Inst. Fourier 40(1992), 625–635. | Numdam | MR 1182642 | Zbl 0738.35054

[12] G. Vodev, Asymptotics on the number of scattering poles for degenerate perturbations of the Laplacian, J. Funct. Anal., 138(2)(1996), 295–310. | MR 1395960 | Zbl 0862.35082