Иванников, Дмитрий, 		Котонаева, Надежда, AND 		Иванникова, Анна.
" Comparative analysis of variations in critical frequency of the ionosphere F2 layer under static heliogeophysical conditions at various latitudinal stations" <em>Radioengineering and telecommunication systems</em> [Online],  Number 1 (14 April 2023)