TY  - RPRT
TI  - Generalized Coleman-Hepp model and quantum coherence.
AU  - K Hiyama
AU  - S Takagi
PY  - 1993
DO  - 10.1103/physreva.48.2586
UR  - https://pubmed.ncbi.nlm.nih.gov/9909908/
ID  - 9909908
ER  -