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Potzuweit, A., Tobias Weich, Sonja Barkhofen, U. Kuhl, H.-J. Stöckmann, and M. Zworski. “Weyl Asymptotics: From Closed to Open Systems.”https://doi.org/10.1103/physreve.86.066205__Physical Review E 86, no. 6 (2012).https://doi.org/10.1103/physreve.86.066205 .

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