@misc{indiciaec81d531241ee,
  title = {Missing-state analysis: A method for determining the origin of molecular nonlinear optical properties.},
  author = {CW Dirk and MG Kuzyk},
  year = {1989},
  doi = {10.1103/physreva.39.1219},
  url = {https://pubmed.ncbi.nlm.nih.gov/9901358/},
  note = {Source identifier: 9901358}
}