1. B. N. Antoshkin, E. Yu. Solopanov, and V. E. Unuchkov, “Facility for Studying the Angular and Spatial Structure of the HF Radiowave Field,” Issled. Geomagn. Aeron. Fiz. Solntsa, No. 42, 77–90 (1987).
2. E. Sh. Goikhman and A. A. Kolosov, “Present-Day State and Potential Development of Over-The-Horizon Radiolocation in the Decameter Radiowave Band,” Zarubezh. Radioelektron., No. 8, 3–19 (1990).
3. O. V. Golovin, Decameter Radiocommunication (Radio i Svyaz’, Moscow, 1990) [in Russian].
4. V. A. Golygin, V. I. Sazhin, and V. E. Unuchkov, “Adaptation of the Ionospheric Radio Channel Parameters to the Current Conditions Using Observations of the Signals of Reference Radio Stations,” Geomagn. Aeron. 47(1), 71–75 (2007) [Geomagn. Aeron. 47, 67–71 (2007)].
5. http://elbert.bldrdoc.gov/pc-hf