TY  - RPRT
TI  - Effective density matrix for free-electron-laser radiation.
AU  - I Gjaja
AU  - A Bhattacharjee
PY  - 1991
DO  - 10.1103/physreva.43.3206
UR  - https://pubmed.ncbi.nlm.nih.gov/9905401/
ID  - 9905401
ER  -