Ваbак VI, Rokityansky II, Sokolova EY, Теreshin AV. Annual, 11-year period and aperiodic variations of the induction vector by eight observatories of Intermagnet network. GJ [Internet]. 2017Mar.1 [cited 2024Nov.23];39(1):97-110. Available from: https://journals.uran.ua/geofizicheskiy/article/view/94013