TY  - CHAP
A1  - Morawetz, K.
T1  - Approximations for the selfenergy
T2  - Interacting Systems far from Equilibrium- Quantum Kinetic Theory
Y1  - 2016
UR  - https://www.hb.fh-muenster.de/opus4/frontdoor/index/index/docId/8470
SP  - 173
EP  - 203
PB  - Oxford-University Press
CY  - Oxford
ER  -