TY  - RPRT
TI  - Excitons in C60 studied by temperature-dependent optical second-harmonic generation.
AU  - A Janner
AU  - R Eder
AU  - B Koopmans
AU  - HT Jonkman
AU  - GA Sawatzky
PY  - 1995
DO  - 10.1103/physrevb.52.17158
UR  - https://pubmed.ncbi.nlm.nih.gov/9981142/
ID  - 9981142
ER  -