@misc{indiciaed9453d3b4281,
  title = {Realization of four-level qudits using biphotons.},
  author = {E V Moreva and G A Maslennikov and S S Straupe and S P Kulik},
  year = {2006},
  doi = {10.1103/physrevlett.97.023602},
  url = {https://pubmed.ncbi.nlm.nih.gov/16907441/},
  note = {Source identifier: 16907441}
}