TY  - RPRT
TI  - Schwinger-Keldysh semionic approach for quantum spin systems.
AU  - M N Kiselev
AU  - R Oppermann
PY  - 2000
DO  - 10.1103/physrevlett.85.5631
UR  - https://pubmed.ncbi.nlm.nih.gov/11136064/
ID  - 11136064
ER  -