@misc{indiciaeb993f38831cf,
  title = {Simple model of second-harmonic generation.},
  author = {WL Schaich and BS Mendoza},
  year = {1992},
  doi = {10.1103/physrevb.45.14279},
  url = {https://pubmed.ncbi.nlm.nih.gov/10001554/},
  note = {Source identifier: 10001554}
}