Stephen Hawking wrote 1999: So what the singularity theorems are really telling us, is that the universe had a quantum origin, and that we need a theory of quantum cosmology, if we are to predict the present state of the universe.«Archived copy». Archivado desde el original el 14 de febrero de 2015. Consultado el 14 de febrero de 2015.
Stephen Hawking wrote 1999: So what the singularity theorems are really telling us, is that the universe had a quantum origin, and that we need a theory of quantum cosmology, if we are to predict the present state of the universe.«Archived copy». Archivado desde el original el 14 de febrero de 2015. Consultado el 14 de febrero de 2015.
