TY  - RPRT
TI  - Coarse-graining approach to quantum cosmology.
AU  - E Calzetta
AU  - M Castagnino
AU  - R Scoccimarro
PY  - 1992
DO  - 10.1103/physrevd.45.2806
UR  - https://pubmed.ncbi.nlm.nih.gov/10014672/
ID  - 10014672
ER  -