TY  - RPRT
TI  - Second-harmonic generation at simple metal surfaces.
AU  - A Liebsch
AU  - WL Schaich
PY  - 1989
DO  - 10.1103/physrevb.40.5401
UR  - https://pubmed.ncbi.nlm.nih.gov/9992570/
ID  - 9992570
ER  -