@misc{indiciaed490c23765dd,
  title = {Bulk contribution in surface second-harmonic generation.},
  author = {P Guyot-Sionnest and YR Shen},
  year = {1988},
  doi = {10.1103/physrevb.38.7985},
  url = {https://pubmed.ncbi.nlm.nih.gov/9945546/},
  note = {Source identifier: 9945546}
}