TY  - RPRT
TI  - Classical equations for quantum systems.
AU  - M Gell-Mann
AU  - JB Hartle
PY  - 1993
DO  - 10.1103/physrevd.47.3345
UR  - https://pubmed.ncbi.nlm.nih.gov/10015955/
ID  - 10015955
ER  -