TY  - RPRT
TI  - Nonequilibrium quantum fields: Closed-time-path effective action, Wigner function, and Boltzmann equation.
AU  - E Calzetta
AU  - BL Hu
PY  - 1988
DO  - 10.1103/physrevd.37.2878
UR  - https://pubmed.ncbi.nlm.nih.gov/9958563/
ID  - 9958563
ER  -