Fluxes of solar extreme ultraviolet radiation near to epochs of activity minimum according to data of direct measurements and results of ionospheric research
Aa. Nusinov et Tv. Kazachevskaya, Fluxes of solar extreme ultraviolet radiation near to epochs of activity minimum according to data of direct measurements and results of ionospheric research, IAN FIZ, 64(9), 2000, pp. 1808-1811