@misc{indiciaeeb65fcb49a0f,
  title = {Resonant-optical-second-harmonic generation from thin C60 films.},
  author = {B Koopmans and A Anema and HT Jonkman and GA Sawatzky and van der Woude F},
  year = {1993},
  doi = {10.1103/physrevb.48.2759},
  url = {https://pubmed.ncbi.nlm.nih.gov/10008676/},
  note = {Source identifier: 10008676}
}