@article{135251,
  author = {Dylan Williams and Bradley Alpert},
  title = {Characteristic Impedance, Power, and Causality},
  year = {1999},
  number = {9},
  month = {1999-05-01},
  publisher = {IEEE Microwave and Guided Wave Letters},
  doi = {https://doi.org/10.1109/75.766757},
  language = {en},
}