TY  - RPRT
TI  - Optical-frequency conversion in gases using Gaussian laser beams with different confocal parameters.
AU  - G Hilber
AU  - DJ Brink
AU  - A Lago
AU  - R Wallenstein
PY  - 1988
DO  - 10.1103/physreva.38.6231
UR  - https://pubmed.ncbi.nlm.nih.gov/9900382/
ID  - 9900382
ER  -