TY  - RPRT
TI  - Two-photon processes in real atoms.
AU  - F Robicheaux
AU  - B Gao
PY  - 1991
DO  - 10.1103/physrevlett.67.3066
UR  - https://pubmed.ncbi.nlm.nih.gov/10044632/
ID  - 10044632
ER  -