TY  - RPRT
TI  - Path integrals, density matrices, and information flow with closed timelike curves.
AU  - HD Politzer
PY  - 1994
DO  - 10.1103/physrevd.49.3981
UR  - https://pubmed.ncbi.nlm.nih.gov/10017401/
ID  - 10017401
ER  -