1. B. Carr, in 1st Karl Schwarzschild Meeting on Gravitational Physics, ed. by P. Nicolini, M. Kaminski, J. Mureika, M. Bleicher (Springer, Berlin, 2015), pp. 22–31, arXiv:1402:1437
2. B. Carr, in 1st Karl Schwarzschild Meeting on Gravitational Physics, ed. by P. Nicolini, M. Kaminski, J. Mureika, M. Bleicher (Springer, Berlin, 2015), pp. 159–167, arXiv:1402:1427
3. S.W. Hawking, Nature 248, 30 (1974)
4. N. Arkani-Hamed, S. Dimopoulos, G. Dvali, Phys. Lett. B 428, 263 (1998)
5. J.A. Wheeler, Phys. Rev. 97, 511–536 (1955)