@misc{indiciaec311806efcea,
  title = {Experimental demonstration of a pure third-order optical parametric downconversion process.},
  author = {J Douady and B Boulanger},
  year = {2004},
  doi = {10.1364/ol.29.002794},
  url = {https://pubmed.ncbi.nlm.nih.gov/15605508/},
  note = {Source identifier: 15605508}
}