史蒂芬·霍金於1999年寫道:「So what the singularity theorems are really telling us, is that theuniverse had a quantum origin, and that we need a theory of quantum cosmology,
Speakable and Unspeakable in Quantum Mechanics, Cambridge University Press, 2004. D. Bohm and B. J. Hiley, The Undivided Universe, Routledge, 1993 Wolfgang