@misc{indiciae255d1c3bbe3b,
  title = {Classical wave propagation in periodic structures.},
  author = {EN Economou and A Zdetsis},
  year = {1989},
  doi = {10.1103/physrevb.40.1334},
  url = {https://pubmed.ncbi.nlm.nih.gov/9991969/},
  note = {Source identifier: 9991969}
}