TY  - RPRT
TI  - Two-level approach to saturation properties in semiconductor materials.
AU  - de Rougemont F
AU  - R Frey
PY  - 1988
DO  - 10.1103/physrevb.37.1237
UR  - https://pubmed.ncbi.nlm.nih.gov/9944632/
ID  - 9944632
ER  -