@conference{217916,
  author = {Dylan Williams and Bradley Alpert},
  title = {Causality and Characteristic Impedance},
  year = {1999},
  number = {36},
  month = {1999-12-02},
  publisher = {ARFTG Conference Digest-Spring, 54th, Atlanta, GA},
  doi = {https://doi.org/10.1109/ARFTG.1999.327366},
  language = {en},
}