Västberg, A. (1997). Investigations of the ionospheric HF channel by ray tracing. Swedish Institute of Space Physics.
Lua i Stíl Chicago (17ú heag.)Västberg, Anders. Investigations of the Ionospheric HF Channel by Ray Tracing. Kiruna: Swedish Institute of Space Physics, 1997.
Lua MLA (8ú heag.)Västberg, Anders. Investigations of the Ionospheric HF Channel by Ray Tracing. Swedish Institute of Space Physics, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.