@article{ivanov1990nonsymmetrical,
  author = "S. Ivanov and E. Alexov and P. Malinov",
  title = "Nonsymmetrical Electromagnetic Waves in Partially Plasma—Filled Waveguide",
  year = 1990,
  journal = "Contributions to Plasma Physics",
  publisher = "WILEY-VCH Verlag Berlin",
  volume = 30,
  number = 6,
  pages = "755-762"
}