TY  - RPRT
TI  - Enhanced squeezing with mixed two-photon and four-photon processes in two external pump fields.
AU  - P Tombesi
PY  - 1989
DO  - 10.1103/physreva.39.4288
UR  - https://pubmed.ncbi.nlm.nih.gov/9901764/
ID  - 9901764
ER  -