TY  - RPRT
TI  - Three-photon spectroscopy on thin films.
AU  - D Fröhlich
AU  - J Kauschalek
AU  - W Nieswand
AU  - C Pahlke
PY  - 1992
DO  - 10.1103/physrevb.45.11016
UR  - https://pubmed.ncbi.nlm.nih.gov/10001022/
ID  - 10001022
ER  -