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, 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.