@misc{indiciaec892ece94b08,
  title = {Kramers-Kronig relations in optical data inversion.},
  author = {K Peiponen and EM Vartiainen},
  year = {1991},
  doi = {10.1103/physrevb.44.8301},
  url = {https://pubmed.ncbi.nlm.nih.gov/9998766/},
  note = {Source identifier: 9998766}
}