1. For background see the excellent lectures of Hartle, J.B.: Predictions in quantum cosmology. Cargèse Lectures 1986: Gravitation in astrophysics
2. Banks, T.: Nucl. Phys. B249, 332 (1985)
3. Brout, R., Horwitz, G., Weil, D.: Phys. Lett. (in press)
4. Brout, R.: Foundations of physics (in press)
5. Often called Hawking radiation after its discoverer. See Hawking's review: Hawking, S.: Quantum cosmology. In: World Scientific Advanced Series in Astrophysics and Cosmology. Fang, L.-Z. (ed.) Vol. 3. Singapore: World Scientific 1987