@misc{indiciae02d815e21188,
  title = {Multipolar contributions to optical second-harmonic generation in isotropic fluids.},
  author = {XD Zhu and YR Shen},
  year = {1990},
  doi = {10.1103/physreva.41.4549},
  url = {https://pubmed.ncbi.nlm.nih.gov/9903663/},
  note = {Source identifier: 9903663}
}