@misc{indiciaed85e6647cbb1,
  title = {One dimensional periodic structures in space and time.},
  author = {Z B Váradi and M T Beck},
  year = {1975},
  doi = {10.1016/0303-2647(75)90045-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/239778/},
  note = {Source identifier: 239778}
}