1. G. A. Aladjev, O. V. Evstafiev, V. S. Mingalev, et al., “Interpretation of Ionospheric F-Region Structures in the Vicinity of Ionisation Troughs Observed by Satellite Radio Tomography,” Ann. Geophys. 19(1), 25–36 (2001).
2. M. Yu. Andreev, T. N. Lukicheva, and V. S. Mingalev, “Model Study of the Effect of the Main Ionospheric Trough on Oblique HF Radiowave Propagation,” Geomagn. Aeron. 46(1), 99–105 (2006) [Geomagn. Aeron. 46, 94–100 (2006)].
3. D. V. Blagoveshchensky and G. A. Zherebtsov, High-Latitude Geophysical Phenomena and Prediction of HF Radiochannels (Nauka, Moscow, 1987) [in Russian].
4. D. V. Blagoveshchensky and T. D. Borisova, “Main Ionization Trough Parameters for Ionosphere Modeling by HF Radio Network Observations,” Adv. Space Res. 16(1), 65–68 (1995).
5. I. G. Boldovskaya, I. B. Egorov, V. N. Egorova, and M. P. Kiyanovskii, Computation of Radiosignal Trajectory Characteristics during Propagation in an Anisotropic Ionosphere,” Issled. Geomagn. Aeron. Fiz. Solntsa 25, 100–112 (1972).