E. Alexov and S. Ivanov. Anisotropic TEM-mode in a plasma waveguide. Sov. J. Plasma Phys.(USA), volume 16, pages 283, 1990.

S. Ivanov, E. Alexov, A. Bogdanov, and P. Malinov. Surface wave evolution in a waveguide with an axial plasma column upon changing the external magnetic field. Plasma physics and controlled fusion, IOP Publishing, volume 32, issue 10, pages 791, 1990.

S. Ivanov and E. Alexov. Electromagnetic waves in waveguide partially filled with semiconductor plasma. Contributions to Plasma Physics, WILEY-VCH Verlag Berlin, volume 30, issue 6, pages 763-774, 1990.

S. Ivanov, E. Alexov, and P. Malinov. Waveguide partially filled with semiconductor plasma. Physica Scripta, IOP Publishing, volume 42, issue 4, pages 452, 1990.

S. Ivanov, E. Alexov, and P. Malinov. Nonsymmetrical Electromagnetic Waves in Partially Plasma—Filled Waveguide. Contributions to Plasma Physics, WILEY-VCH Verlag Berlin, volume 30, issue 6, pages 755-762, 1990.

S. Ivanov, A. Bogdanov, and E. Alexov. A new family of electromagnetic waves in a waveguide filled with magnetoactive semiconductor plasma. Physica Scripta, IOP Publishing, volume 42, issue 4, pages 458, 1990.

S. Ivanov and E. Alexov. Electromagnetic waves in a plasma waveguide. Journal of plasma Physics, Cambridge University Press, volume 43, issue 1, pages 51-67, 1990.