TY  - RPRT
TI  - Four-photon squeezed states: An exactly solvable model.
AU  - P Tombesi
AU  - A Mecozzi
PY  - 1988
DO  - 10.1103/physreva.37.4778
UR  - https://pubmed.ncbi.nlm.nih.gov/9899626/
ID  - 9899626
ER  -