Belikovich, V. V., E. A. Benediktov, V. D. Vyakhirev, and L. V. Grishkevich (1983), Catalog of the electron concentration profiles in the D region of the midlatitude ionosphere, in: Development of the Principles of Creation of an Empirical Model, Preprint 171 (in Russian), p. 51, Radiophys. Res. Inst., Gorky, Russia.
Belkina, L. M. (1968), Spatial-time variations in the radio wave absorption in the ionosphere, Geomagn. Aeron. (in Russian), 8, (2), 309.
Bilitza, D. (1990), International reference ionosphere 1990, WDC-A-R and 90-22, Natl. Space Sci. Data Cent., Greenbelt, Md.
Bilitza, D., and E. A. Benediktov, et al. (1981), Electron density in the D region as given by the International Reference Ionosphere, in: Report UAG 82, p. 7-10, WDC-A-STP, Boulder, Colorado.
Bremer, J., and W. Singer (1977), Diurnal, seasonal and solar-cycle variations of electron densities in the ionospheric D and E regions, J. Atmos. Terr. Phys., 39, 25.
Bremer, J., H. Gernandt, and H. Lucke (1980), Global ionospheric absorption measurements on board ships, Gerlands Beitr. Geophys., 89, 81.
Chasovitin, Yu. K., Ed. (1983), Reference Model of the Concentration, Temperature and Effective Collision Frequency of Electrons in the Ionosphere at Heights Below 200 km, report (in Russian), Inst. of Exp. Mineral., Obninsk, Russia.
Chasovitin, Yu. K. (1988), Global empirical model of the distribution of the concentration, temperature, and effective collision frequency of electrons in the ionosphere, Ionospheric Stud. (in Russian), 44, 6.
Danilov, A. D. (1998), Solar activity effects in the ionospheric D region, Ann. Geophys., 16, 1527.
Danilov, A. D., and S. Yu. Ledomskaya (1983), Creation of the empirical model of the D region, Proc. Inst. Exp. Meteorol. (in Russian), 13, 28.
Danilov, A. D., and N. V. Smirnova (1994), Comparison of the International Reference Ionosphere to the rocket measurements, Geomagn. Aeron. (in Russian), 34, (6), 74.
Danilov, A. D., A. Yu. Rodevich, and N. V. Smirnova (1991), Parametric model of the D region taking into account meteorological effects, Geomagn. Aeron. (in Russian), 31, (5), 881.
Danilov, A. D., A. Yu. Rodevich, and N. V. Smirnova (1995), Problems with incorporating a new D -region model into the IRI, Adv. Space Res., 15, (2), 165.
Fligel', M. D. (1962), Geographical distribution of ionospheric absorption, Geomagn. Aeron. (in Russian), 2, (6), 1091.
Friedrich, M., and K. M. Torkar (1992), An empirical model of the nonauroral D region, Radio Sci., 27, 945.
Friedrich, M., and K. M. Torkar (2001), FIRI: A semiempirical model of the lower ionosphere, J. Geophys. Res., 106, (A10), 21,409.
George, P. L. (1971), The global morphology of the quantity N n dh in the D and E regions of the ionosphere, J. Atmos. Terr. Phys., 33, 1893.
Givishvili, G. V. (1976), Spatial-time variations of the electron concentration in the lower ionosphere, Geomagn. Aeron. (in Russian), 16, (1), 92.
Ginzburg, E. I., and I. I. Nesterova (1974), Spatial-time variations in the ne(h) profiles in the lower ionosphere, in: Problems of Studies of the Lower Ionosphere and Geomagnetism (in Russian), p. 3, Inst. of Geol. and Geochem., Russ. Acad. of Sci., Novosibirsk.
Gravens, T. E., and A. I. Stewart (1978), Global morphology of nitric oxide in the lower E region, J. Geophys. Res., 83, (A6), 2447.
Knyazev, A. K., L. B. Vanina, L. B. Korneeva, and V. N. Avdeev (1993), Specification of the empirical model of the electron concentration in the D region on the solar zenith angle using the rocket measurements, Geomagn. Aeron. (in Russian), 33, (5), 143.
McNamara, L. F. (1979), Statistical model of the D region, Radio Sci., 14, 1165.
Mechtly, E. A., M. M. Rao, D. O. Skaperdas, and L. G. Smith (1969), Latitude variations of the lower ionosphere, Radio Sci., 4, 517.
Nesterova, I. I., and E. I. Ginzburg (1985), Catalog of the Electron Concentration Profiles (in Russian), 211 pp., Inst. of Geol. and Geochem., Russ. Acad. of Sci., Novosibirsk.
Pancheva, D., and Pl. Mukhtarov (1997), Diurnal and seasonal variations of electron densities in the midlatitude D region, J. Bulg. Geophys., 23, (1-2), 41.
Schwentek, H. (1976), Ionospheric absorption between 53oN and 53oS observed on board ship, J. Atmos. Terr. Phys., 38, (14), 89.
Shirke, J. S., and G. W. Henry (1967), Geomagnetic anomaly in ionospheric absorption at low latitude observed on board USNS Croatan, Ann. Geophys., 23, 517.