TY  - RPRT
TI  - Reduced density matrices and decoherence in quantum cosmology.
AU  - R Laflamme
AU  - J Louko
PY  - 1991
DO  - 10.1103/physrevd.43.3317
UR  - https://pubmed.ncbi.nlm.nih.gov/10013283/
ID  - 10013283
ER  -