TY  - RPRT
TI  - Free-electron-laser model without the slowly-varying-envelope approximation.
AU  - EH Haselhoff
PY  - 1994
DO  - 10.1103/physreve.49.r47
UR  - https://pubmed.ncbi.nlm.nih.gov/9961306/
ID  - 9961306
ER  -