1. I. Y. Park, “Quantum ‘violation’ of Dirichlet boundary condition,” Phys. Lett. B, 765, 260–264 (2017) arXiv:1609.06251v3 [hep-th] (2016).
2. S. W. Hawking, “Breakdown of predictability in gravitational collapse,” Phys. Rev. D, 14, 2460–2473 (1976).
3. D. N. Page, “Black hole information,” in: Proceedings of the 5th Canadian Conference on General Relativity and Relativistic Astrophysics (Waterloo, Ontario, 13–15 May 1993, R. B. Mann and R. G. McLenaghan, eds.), World Scientific, Singapore, pp. 1–41; arXiv:hep-th/9305040v5 (1993).
4. S. D. Mathur, “The fuzzball proposal for black holes: An elementary review,” Fortschr. Phys., 53, 793–827 (2005) arXiv:hep-th/0502050v1 (2005).
5. J. Polchinski, “The black hole information problem,” in: New Frontiers in Fields and Strings (Boulder, Colorado, 1–26 June 2015, J. Polchinski, P. Vieira, and O. DeWolfe, eds.), World Scientific, Singapore (2017), pp. 353–397; arXiv:1609.04036v1 [hep-th] (2016).